What is the present age of the son?
I) The sum of the present ages of the father and the son is 45
II) Five years ago the father's age was 6 times the age of the son

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.