Last year 100 adult cats, half of whom were female, were brought into the Smallville Animal Shelter. Half of the adult female cats were accompanied by a litter of kittens. The average number of kittens per litter was 4 . What was the total number of cats and kittens received by the shelter last year?
Answer Choices
A. 150
B. 200
C. 250
D. 300
E. 400