"Improving Our Sleep Habits" Is a Poorly Phrased Specific Purpose

Multiple Choice

"Improving our sleep habits" is a poorly phrased specific purpose for a speech because it is

A) too technical for a classroom speech.
B) written as a sentence rather than a declarative phrase.
C) expressed in figurative language.
D) written as a fragment rather than a full infinitive phrase.
E) written as a statement rather than a question.