In the matrix $$A = \begin{bmatrix}-5 & 20 \\2 & -x \end{bmatrix}$$, what is the value of x ?
I. A is singular
II. A is symmetric

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.