Which of the Following Is True of Aldehydes and Ketones

Multiple Choice

Which of the following is true of aldehydes and ketones?

A) They have an appreciable dipole moment because of the polar C=O bond.
B) They have lower boiling points than alkanes and alkenes of comparable molecular mass.
C) They are typically prepared by reducing alcohols.
D) In their reactions, the partially positively charged carbon atom of the carbonyl group is subject to an electrophilic attack.
E) In their reactions, the lone pairs of electrons on the oxygen atom of the carbonyl group allow a nucleophilic attack to occur.