What does WXY equal?
(A) W=X+Y
(B) WXYZ = 6Z

if both statements (A) and (B) together are sufficient to answer the Question n asked, but neither statement alone is sufficient.

if statement (B) alone is sufficient but statement (A) alone is not sufficient to answer the question asked.

if statement (A) alone is sufficient but statement (B) alone is not sufficient to answer the question asked.

if each statement is sufficient by itself to answer the question asked.