Describe the Acid-Catalyzed First Slow Step in the Hydrolysis of an Ester

Multiple Choice

Describe the acid-catalyzed first slow step in the hydrolysis of an ester.

A) The electron pair on oxygen forms double bond and alcohol is the leaving group.
B) The base abstracts extra hydrogen from protonated alcohol.
C) The oxygen of the carbonyl group abstracts a hydrogen from HB.
D) Water attacks the carbonyl carbon and electron pair goes to oxygen.
E) The oxygen on the alkoxy group abstracts a hydrogen from HB.