I am not sure how to read your choices but the future perfect third person is
he or she will have followed by the past tense of a verb. You have to read that a couple of times to get it right.
Perfect means the action will be completed some time in the future.
Third person is he she it. (in the singular form.)
he will have become a grandmaster chess player by that time, would be a correct use of the verb become.
D.
The independent sentences are separated accurately with a ;
You can find the answer if you search this question on go ogle, it would be too difficult for me to copy paste but it literally comes up lol
