Answer:
(1)Although he's not very proud of his wealth, the old man is rich.
(2)The thief escaped when it was dark.
(3)I saw the boy, he won the medal.
(4)Raj is very silly, she will believe anything.
Explanation:
I believe it is B. The word possessive has the word "possess" in it, which means to have or own. So think of it like this: "That car is theirs." You could also say that they possess that car, or own that car.
Answer is A because Staying is the opposite of sending:)