What is the average weight of the four students A, B, C and D?
I) Average weight of A, Band C is 64 kg
II) Average weight of B, C and D is 66 kg.

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 the statements I and II together are sufficient to answer the question but neither statement alone is sufficient.

D

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