The deer is expected to have an average of 2 calves. This means that the answer to this question is letter B. There is a lot of deer that produce twins but there are also some who can bear only one calf. There are 20% of deer that can give triplets. A deer can only be pregnant once a year as the gestation period usually lasts about 200 days.
There are some experts who say that a deer may only live up to 5 years but there are also some that can live up to 25 years provided that they are not disturbed by humans who may hunt them for gaming purposes.