If n is an integer and 10I.The sum of the digits in 7 is 12.
II.One digit in 7 is 3 times the other.

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 statements aloneis sufficient.

D

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