Which one of the following is the correct representation of set A = {1,3,5,7….} in set builder form?

• A. {x: x = 2n where n ∈ N}
• B. {x: x = n2-1 where n ∈ N}
• C. {x: x = 2n+1 where n ∈ N}
• D. {x: x = 2n-1 where n ∈ N}