If the set U = {all positive integers} and set A = {x|x ∈ U and x is an odd positive integer}, which describes the complement of set A, Ac?
A
Ac = {x|x ∈ U and is a negative integer}B
Ac = {x|x ∈ U and is zero}C
Ac = {x|x ∈ U and is not an integer}D
Ac = {x|x ∈ U and is an even positive integer}