The number N is the product of all positive odd integers from 1 to 99 that do not end in the digit 5. That is, N=1\times3\times7\times9\times11\times13\times17\times19\times\cdots\times91\times93\times97\times99. The units digit of N is
Answer Choices
A. 1
B. 3
C. 5
D. 7
E. 9