Please help ty asap

Which three sentences in this excerpt from arthur conan doyle's "the contest" suggest that the author's tone is mocking?

Which secondary effect of advertisement happens when a customer is satisfied by a product and buys it for a second time?

Something you may do if the weather's nice on sunday. -something you might not want to do this evening. -something you could go on aaturday evening. -something you could wear to a party. -somebody you might see in the next couple of days. -a subject you could study at college or university. -somewhere you might go on holiday .