If sy > 0 and yz < 0, which of the following must be negative:
Choose the correct choice from the following choices.
A) syz	B) sy(z^2)	C) s(y^2)z	D) x(y^2)(z^2)	E) (x^2)(y^2)(z^2)
sy &gt; 0 means that sy is positive.   yz &lt; 0 means that yz is negative.   s(y^2)z = (sy)(yz) = positive*negative = negative. Thus option s(y^2)z is always negative.
<result>C</result>
If sy > 0 and yz < 0, which of the following must be negative: