Solve the Problem $a _ { n } = ( n + 9 ) ( n - 1 )$

Multiple Choice

Solve the problem.
-The number of birds born each year at the local zoo forms a sequence whose general term is $a _ { n } = ( n + 9 ) ( n - 1 )$ . Find the number of birds born in the fourth year, and find the total number of birds born in the first four years.

A) 39 birds; 84 birds
B) 24 birds; 45 birds
C) 39 birds; 74 birds
D) 24 birds; 35 birds