In the following question, a given question is followed by information in three statements. You have to decide the data in which statement(s) is sufficient to answer the question and mark your answer accordingly.
A, B, C, D, E and F are six employees. Each of them gets different number of mails–15,20,30, 50, 60 and 70 everyday but not necessarily in the same order. Who is the shortest among all and what is the number of mails that D gets?
I. E is taller than only D and F. C is the tallest among all but does not get the least number of mails. A gets half the number of mails of what B gets.
II. A is taller than B. The sum of mails of A and E is equal to the number of mails that D gets. The one, who gets 50 mails is not the shortest. D does not get the highest number of mails.
III. A does not get 15 mails. B is not taller than A. D gets more mails than E but less than C.

Options

A. Statement I and II together are sufficient.
B. Statement I alone or statement II alone is sufficient.
C. Statement II alone is sufficient.
D. Statement I and II together are not sufficient.