Is the product s*t negative?

Is the product st negative?

(1)s^2 s < 0
(2) s-4 =t-3

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 one ALONE is sufficient.
D)EACH statement ALONE is sufficient.
E)Statements (1) and (2) TOGETHER are NOT sufficient.