单项选择题

M: How does the new computer X-515 sell
W: It doesn’t sell as well as X-525.

What can we learn from the dialogue()

A. X-515 sells better than X-525.
B. X-515 sells as well as X-525.
C. X-525 sells better than X-515.
D. X-525 doesn’t sells as well as X-515.