I think it is false because i had this question before.
Hi
the answer should be A
Ex : I read a letter. It was on your desk = I read the letter which was on your desk
The woman was so scared by the movie.She began to cry
= The woman, so scared by the movie, began to cry.
There was amazing news in the newspapers. They were interesting.
The news in the newspaper were interesting
I hope I helped
Have a nice day !!
B.
<span>Unemployment is high in many fields, but there are jobs available in telecommunications.
A comma is used when it is placed after the end of one independent clause and the beginning of another which follows one such clause. The two independent clauses must be joined with words known as co-ordinating conjunctions. Examples of such words are, but, and,or so etc.
In this sentence but is used, </span>preceded by a comma so it is the right one.