M: I want to send this package by first-class mail. W: Do you want it insured? M: Yes, for 50 dollars, please. I'd also like some stamps--a book of 22 and three airmail. W: You'll have to get those at the stamp window over there, next to general delivery. M: Can I get money orders there, too? W: No, that's to the left, three windows down the hall., Question: How many airmail stamps does the man want to buy? (A) 3 (B) 22 (C) 25
(A) 3