A. Emperor penguins weigh...
The text mentions that Emperor penguins weigh about 40 kg, so the correct answer is 3) about forty kilograms.
B. Scientists believe that in the past penguins were...
According to the information provided, scientists think that in the past there were penguins that were 2 meters tall and weighed as much as 115 kg, indicating they were 2) bigger than penguins today.
C. Choose the TRUE sentence.
The text states that both male and female penguins take turns sitting on the eggs and keeping them warm. Therefore, the correct answer is 3) Both male and female penguins keep their eggs warm.
D. Mother penguins...
The text explains that female penguins (mother penguins) bring food to their babies when they return from the sea, so the correct answer is 3) feed their babies.
E. Young penguins can get their own food in December because...
The text mentions that in December, the Antarctic weather warms the ice where young penguins live, and the ice begins to break up, bringing open waters closer to the places where the young penguins are. Therefore, the correct answer is 1) there are open waters close to them.