Which answer is a correctly punctuated compound sentence? a. my little sister's favorite stuffed animal is torn and dirty but she would not trade it for a store full of new toys. b. my little sister's favorite stuffed animal is torn and dirty she would not trade it, however, for a store full of new toys. c. my little sister's favorite stuffed animal is torn and dirty, but she would not trade it for a store full of new toys. d. my little sister's favorite stuffed animal is torn and dirty she would not trade it; however, for a store full of new toys.