Here is a poster of the Youth Sports Club.  Read it and answer the questions. Youth Sports Club Sport of the Month: Tennis 11:00 a.m. ~ 7:00 p.m. Ticket price for each event: v $100 a person v $50 a person for groups with over 15 persons & poster 海报 event 活动 Mr. Brown, a PE teacher, took his students to the club.  There they watched early tennis games and learned about the history of the sport.  When did they most likely visit the club? & likely 可能地 A．February 6. B．February 13. C．February 20. D．February 27. Mr. Brown paid $1,050 for the tickets.  How many students did he take with him? A．25. B．20. C．15. D．10.