17. Which if the following is true of a limit order: a. Guarantees price but not execution b. Guarantees price and execution c. Does not guarantee price or execution d. Guarantees execution but does not guarantee price 18. Shares of open-end mutual funds are purchased and sold on exchanges. a. True b. False 19. The net asset value of a mutual fund is calculated multiple times throughout the day. a. True b. False 20. A front-end load is a withdrawal fee assessed when you withdraw money from the mutual fund. a. True b. False