Is the angle A of the triangle ABC acute?
I) ABC is a right angled triangle
II) $$\angle B = 90^{\circ}$$

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.