I going to have to say the answer is A
The two subjects of the sentence are Colonel Lloyd and his "finely cultivated garden".
the answer is C you can argue both about that
I think the incorrect pronoun shift would be the line "<span>before you adopt a pet". I think it should be before one adopts a pet. This is because the sentence started with "It is". The "you" made the sentence very confusing. The second pronoun should be singular, the pronoun you is often denoted as plural and not singular.</span>
Answer:
"It was still hot, and everything was very strange"
