If r and s are two different prime numbers, which of the following cannot be true?  Choose the correct choice from the following answers:  A) rs is odd.  B) r + s is even.  C) r + s is odd.  D) rs is even.  E) r/s is an integer
A prime number is a positive integer with exactly two distinct positive divisors: 1 and itself. So, a prime number cannot be a multiple of another prime number. Which makes option E not possible (r/s=integer means that r is a multiple of s).   .   All other options are possible:   A. rs is odd --&gt; r=3 and s=5;   B. r + s is even --&gt; r=3 and s=5;   C. r + s is odd --&gt; r=2 and s=3;   D. rs is even --&gt; r=2 and s=3;   Answer: r/s is an integer
<result>E</result>
If r and s are two different prime numbers, which of the following cannot be true?