If A, B, C are the angles and a, b, c are lengths of the sides opposites to them respectively, then, is the triangle ABC equilateral?
I. $$\frac{a}{\cos A} = \frac{b}{\cos B} = \frac{c}{\cos C}$$
II. $$A + B + C = \pi$$

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 statement I and II are sufficient to answer the question but neither statement alone is sufficient.

D

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