Jenny is in charge of ordering t-shirts for the math club at her school. if she paid $294 for 21 t-shirts, which of the following statements is true? a. jenny paid $294 for 21 t-shirts, which is a rate of $21 per t-shirt. b. jenny paid $294 for 21 t-shirts, which is a rate of $273 per t-shirt. c. jenny paid $294 for 21 t-shirts, which is a rate of $35 per t-shirt. d. jenny paid $294 for 21 t-shirts, which is a rate of $14 per t-shirt.