12. Calculator
Let m be any non-zero rational number. Let n be any irrational number.
Which value(s) is (are) irrational?
A
Only the product of in and n, mn, is irrational.
B.
Only the sum of m and n, m+n, is irrational.
C.
Neither the sum, m_n, nor the product, mn, of m and n is irrational.
D.
Both the sum, men, and the product, mn, of m and n are irrational.