i was an mba student in the usa

Read the following passage and mark the letter A, B, C, or D đồ sộ indicate the answer đồ sộ each of the question.
Hibernation is typically linked đồ sộ seasonal changes that limit food supplies. It is identified by metabolic suppression, a drop in toàn thân temperature and torpor- a sleep- lượt thích state- interspersed with brief bouts of wakefulness. Though certain species of fish, amphibians, birds and reptiles are known đồ sộ lie dormant during cold winter months, hibernation is generally associated with mammals, according đồ sộ Don Wilson, a curator emeritus of vertebrate zoology at the Smithsonian National Museum of Natural History.
Endothermic mammals- “warm- blooded” animals that generate toàn thân heat internally- need a constant energy source đồ sộ keep their engines running, Wilson told Live Science. And when that energy source becomes difficult đồ sộ find, hibernation can help them weather harsh conditions.
“During times of the year when that energy source is missing- especially in northern climates- one coping mechanism is đồ sộ just shut down,” he said. “They’ll feed heavily during the few months when food is plentiful and build up fat, then go đồ sộ sleep and live off their fat reserves”.
A special type of fat called “brown fat” accumulates in hibernating mammals, Wilson said. Bats that hibernate develop brown fat on their backs between their shoulder blades, but mammals can also store brown fat in their bellies and elsewhere in their bodies, Wilson said.
Brown fat goes a long way because the hibernating animal draws on it very slowly, reducing their metabolism đồ sộ as little as 2 percent of their normal rate, according đồ sộ a 2007 study published in the Journal of Neurochemistry.
Their core toàn thân temperature is also greatly reduced. It generally hovers close đồ sộ the air temperature in the animal’s den but can sometimes fall as low as 27 degrees Fahrenheit (minus 3 degrees Celcius) in Arctic ground squirrels, according đồ sộ Kelly Drew, a neurochemist and professor with the Institute of Artic Biology at the University of Alaska Fairbanks.
Arctic ground squirrels’ bouts or torpor last about two or three weeks, Drew told Live Science, and the animals rouse “ pretty consistently” for about 12 đồ sộ 24 hours, before resuming their winter sleep. They repeat this process for up đồ sộ eight months.
But even though Arctic squirrels maintain a lower toàn thân temperature phàn nàn any other hibernating mammal, the changes in their bodies overall aren’t that different from those that occur in other hibernating mammals, Drew said.
“The quality of mammalian hibernation is similar from bears đồ sộ hamsters đồ sộ ground squirrels,” Drew said. “The distinguishing feature is how cold they get”.
The word “weather” in the second paragraph is closest in meaning đồ sộ ______.