Among A, B, C, D and E, who is the heaviest?
(I) C is heavier than only A.
(II) D is lighter than B, but heavier than C and E.

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answer the question.

C

if both the statements I and II are sufficient to answer the question but neither statement alone is sufficient

D

it both the statements I and II together are not sufficient to answer the question and additional data is required.