为什么选B？？

Q23:

One kilogram of a certain coffee blend
consists of x kilogram of type I coffee and y kilogram of type II coffee.  The cost of the blend is C dollars per
kilogram, where C = 6.5x + 8.5y.  Is x
< 0.8?

(1)     y > 0.15

(2)     C ≥ 7.30

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.