The first four terms of a sequence are shown below:

7,4,1,-2

which of the following functions best defines this sequence?

A) f(1)=7, f(n+1)= f(n)+3; for n>= 1

B) f(1)=7, f(n+1)= f(n)-3; for n >= 1

C) f(1)=7, f(n+1)= f(n)-4; for n >= 1

D) f(1)=7, f(n+1)= f(n)+4; for n >= 1