What is the sum of the first 20 terms of the Anthmetic Progression ?
I. The sum of the first term and $$20^{th}$$ term of the AP is 120.
II. The common difference of the AP is 5.

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 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.