Which of the following sentences is RIGHT? （ ）.

A、My father is a very sentimental man he still has my kindergarten drawings.
B、The fern hadn’t been watered in a month its leaves looked like frayed brown shoelaces.
C、Craig wanted to buy his girlfriend a ring he began saving ten dollars a week.
D、A trip to the zoo always depresses me, for I hate to see animals in cages.