If the quotient a/b positive, which of the following must be true? Options.
A) a > 0 B) b > 0 C) ab > 0 D) a-b > 0 E) a+b > 0
a/b&gt;0 means aa and bb have the same sign, either both are negative or both are positive. Thus, their product will also be positive: ab&gt;0.   Answer: ab &gt; 0.
<result>C</result>
If the quotient a/b positive, which of the following must be true?