What is the length of the train?
I. The train takes 10 seconds to cross a bridge
II. The train takes 30 seconds to cross a platform.

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 statement I and II alone 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.