How many pages of the book X did Robert read on Sunday ? I. The book has 300 pages out of which two-third were read by him before Sunday. II.Robert read the last 40 pages of the book on the morning of Monday.

A) If the data in statement I alone are sufficient to answer the question

B) If the data in statement II alone are sufficient answer the question

C) If the data either in I or II alone are sufficient to answer the question;

D) If the data in both the statements together are needed.