Simple Enols Are Less Stable Than the Tautomeric Keto Forms $\pi$

Multiple Choice

Simple enols are less stable than the tautomeric keto forms because:

A) severe angle strain exists in the enol forms.
B) fewer atoms are coplanar in the keto form.
C) the enol cannot be chiral.
D) the C-C $\pi$ bond is weaker than the C-O $\pi$ bond.
E) Actually,simple enols are the more stable.