Q Consider the statement: If is rational and y is irrational, then x +y is irrational. of To prove this statement using a proof by contradiction, we would start by assuming that: Fir stion O a. if x is irrational and y is rational, then x+y is irrational. Ob. x is rational, and y is irrational. OC. If xis rational and y is irrational, then x+y is rational. O d. x is irrational, y is rational, and x+y is irrational. Oe. x is rational, y is irrational, and x+y is rational