If {x} is the product of all even integers from 1 to x inclusive, what is the greatest prime factor of {20} + {24}?
Pick:
A) 23 B) 25 C) 11 D) 5 E) 2

Rationale: "soln : { 24 } + { 20 } = 24 * { 20 } + { 20 } = 25 * { 20 } answer : b"
Answer: B