The answer is:
Engels edited Marx's The Condition of the Working Class in England.
I'm pretty sure it's both A and D, but the more correct answer is D.
Answer:
Gail should compare Ads used in identical ways, on the same channels, and directed towards the same audience, in this way she can improve her Ad content.
It was a research development project that made the first atomic bombs during WW2
the United States led it with the help of the UK and Canada
