A contains an error: "and then she publishes them under a false name" is an independent clause and should have a comma before it.
B contains an error, as the comma should be before "but", not after it, for the same reason as A.
C correctly shows what should have been done in A and B.
D should not have a comma after "but".
C is the correct answer.
It most definitely won't be a or c, because that's bad this to put in an advertisement. D would be ok, but it wouldn't be the best answer because they already have a slogan. I would choose b, citing an expert opinion, to make the advertisement more persuasive.
D. Leslie ran to the door, greeting his mother with open arms.
C
Because
A.this is in the stratosphere
B.Thats the exosphere
D.this is from the ozone layer which is in the stratosphere
Vas happenin!!!
Hope your day is good
The tension will ease
Hope this helps you out
*smiles*
Žayń Mälik