Which is the range of a function f(x) = x + 3 for the domain { 1, 2, 3, 4 }
A. ( 4, 5, 6, 7 )
B. ( 3, 6, 9, 12 )
C. ( 4, 5, 9, 12 )
D. ( 3, 5, 6, 7 )​