求解一道数学题！

cyt1111111

If l1 ║ l2 in the figure above, is x = y? (1)     p║r and r║t(2)     q║s   
If l₁ ║ l₂ in the figure above, is x = y?  (1)     p║r and r║t
(2)     q║s         
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
  E. Statements (1) and (2) TOGETHER are NOT sufficient.
A为啥不行呢！