Let B Mean "The Bread Rises" and Y Abbreviate "The

Multiple Choice

Let B mean "the bread rises" and Y abbreviate "the yeast is good." The he compound statement B ? Y correctly represents any of the following propositions, except:

A) That the yeast is good is a necessary condition for the bread to rise.
B) That the yeast is good is a sufficient condition for the bread to rise.
C) The bread rises only if the yeast is good.
D) If the bread rises, the yeast is good.