What is a complex sentence? A . A complex sentence has independent clauses joined with conjunction.

B . A complex sentence is a clause that is missing either a subject or a predicate .

C . A complex sentence includes a subordinating conjunction and clause .

D . A complex sentence contains a dependent clause and an independent clause

B . A complex sentence is a clause that is missing either a subject or a predicate .

Explanation:

the answer to the question is D

the answer to the question is punishment. or more specifically, positive punishment.

positive punishment occurs when a behavior is given a negative consequence for the individual doing the behavior.

sara no longer wants to ask questions (the behavior) because she is ridiculed by mr. smith (the punishment).

reinforcement is inaccurate because reinforcement always gives positive consequences for the individual doing the behavior, be it by introducing a pleasant consequence or removing an unpleasant one.