What is the sum of the different positive prime factors of 960?
Choose the correct choice from the following answers:  A) 5  B) 10  C) 15  D) 17  E) 21
Prime factorization of 960   =96 * 10   =16*6 * 10   =4*4 * 2*3 * 2*5   =2*2 * 2*2 * 2* 3 * 2*5   =2^6 * 3 * 5   Sum of the different positive prime factors of 960 = 2+3+5= 
<gadget id="calculator">2+3+5</gadget>
<output>10</output>
10   Answer 10
<result>B</result>
What is the sum of the different positive prime factors of 960?