Explanation:
Let's simplify each fraction as much as possible.
A:
2/14 = 1/7
B:
4/28 = 1/7
C:
5/35 = 1/7
D:
2/8 = 1/4
E:
7/49 = 1/7
F:
7/40 (cannot be further simplified)
I think you may have a typo in your question as there are no answers. However if the question is asking for 1/7, the answers are A, B, C, E.