A、People could send money in post offices years ago. B、People can’t send mails in post offices now. C、Post offices are offering

W: I need to exercise my arms too. How can I do that?
M: One good way is to do push-ups. Another way is to use weights. Make sure you grip the weights firmly. You don’t want to drop them on your feet!
Q: What are the two speakers mainly talking about?

W: Post offices offer lots of services nowadays, don’t they? Years ago, you could only send mails, but now you can also save money, and send or collect money.
M: Nowadays, they offer so much service that you hardly know which one to choose.
Q: What can be inferred from the conversation?