A .OPEC began an oil embargo of the United States.
The Answer is the Letter D.
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be the "rise in opposition over slavery," since this was what separated the Republicans from the Whigs. </span></span>
Answer:
The Sleep of Reason Produces Monsters
by Francisco Goya
