A、About every five minutes. B、About every six minutes. C、About every seven minutes. D、About every eight minutes. BHow often do t

M: Uh, where am I? Hum...
W: Excuse me. Do you need any help?
M: I...I’m just looking...well, I want to go to the Science Museum, but I’ve been lost for the past hour.
W: Ah, just press this button. And from here, it’s a dollar fifty.
M: OK.
W: Then, get on the train at platform No. 4.
M: Alright. Oh, and how often do the trains come around this time of day?
W: Usually, they come about every six minutes.
M: And where do I get off the train?
W: Get off at State Street Station, three stops from here.
M: I got it now. Thanks for your help.
W: No problem. Good luck.