Suppose You Are Shown Four Cards and Told That Each

Multiple Choice

Suppose you are shown four cards and told that each card has a letter on one side and a number on the other.You can see only one side of each card.Card one has an E on it; card two has a K on it,card three has a 4 on it,and card four has a 7 on it.You must determine whether the following hypothesis is true or false: If there is a vowel on one side,then there is an even number on the other side.What is the minimum number of cards you must examine to test this hypothesis?

A) 1
B) 2
C) 3
D) 4