Answer:
The tea set is an important part of British life and has become more valuable through the years
MacGregor believes the set is a symbol of British history and includes a quotation from a historian to support his point.He believes that the antique tea set belonged to the Royal Navy and quotes a historian to prove his theory.
A conjunction can be placed after the comma to make the sentence make sense (i.e. and, so, ect).
Im not sure but I think that it is C.
(let me know if I am wrong please)
I hope this helps ^-^
