In the triangle shown, the first diagonal line, 1,2,3,4,\dots, begins at 1 and each number after the first is one larger than the previous number. The second diagonal line, 2,4,6,8,\dots begins at 2 and each number after the first is two larger than the previous number. The n^{th} diagonal line begins at n and each number after the first is n larger than the previous number. In which horizontal row does the number 2016 first appear?
Answer Choices
A. 90
B. 94
C. 88
D. 91
E. 89