<span>B. returning Montreal to the French</span>
"The OPEC oil embargo" was the reason of the oil crisis during the 1970s among the choices given in the question. The correct option among all the options that are given in the question is the third option or option "C". I hope the answer has actually come to your desired help.
In addition to giving retirees money, Social Security was "<span>requiring retirees to spend their money in the US." which of course spurred the economy. </span>