Pick out the correct sentence:
AThousand dollars is a high price to pay.
BThousand dollars were a high price to pay.
CThousand dollars are a high price to pay.
DThousand dollars have a high price to pay.
AThousand dollars is a high price to pay.
BThousand dollars were a high price to pay.
CThousand dollars are a high price to pay.
DThousand dollars have a high price to pay.