ISP (Internet Service Provider) LAN email websiteA(n) ________ allows people to compose, send and receive messages quickly and conveniently at any time rather than going to the postoffice and mailing a letter.

To get to the post office,(A) first, go straight from here for two blocks. (B)Next, turn right on Freedom Street. (C)Then walk for another block, and you'll see the postoffice (D)on your left. A: A B: B C: C D: D