Which of the Following Is True of a Base?
A) $\mathrm { H } ^ { + }$

Multiple Choice

Which of the following is true of a base?

A) It is a substance that dissociates in water to produce $\mathrm { H } ^ { + }$ ions.
B) It has a pH value lesser than 7.
C) It is an electron-pair acceptor.
D) It is any substance that can donate a proton.
E) It usually has one or more lone pairs of electrons.