A. I ate a slice of bread last night.
B. Sita lost her earring in the park
C. I sold my watch to him last month
Semicolon is used when separating 2 closely related independent clauses.
Colon is used when listing things, writing biblical references, between hours and minutes, proportion between 2 numbers, or between 2 clauses related to the first
So we'll write this one as-
Flour Power: A Guide to the Modern Green Kitchen
You're answer's the last choice
The other option of the answer