Write a Formula for the General Term, or Nth Term $a _ { n } = n ( n - 4 )$

Multiple Choice

Write a formula for the general term, or nth term, for the given sequence.
-1 ·5, 2 ·6, 3 ·7, 4 ·8, 5 ·9, . . .

A) $a _ { n } = n ( n - 4 )$
B) $a _ { n } = n + 4 n$
C) $a _ { n } = n ( n + 4 )$
D) $a _ { n } = n ( n + 5 )$