Suppose you want to give a proof by contradiction of this result: For all integers, if x and y are odd, then 3x + 2y is odd.
What is the proof by contradiction method?
a) Assume the conclusion is false and show it leads to a contradiction.
b) Assume the conclusion is true and show it leads to a contradiction.
c) Assume the conclusion is true and show it leads to the desired result.
d) Assume the conclusion is false and show it leads to the desired result.