What are some special effects in romantic films?

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

Hey, can you guys keep awnsering my questions

Which of the following sentences uses dashes correctly? a. i looked under the bed - get this - and there it was! b. i need - a lot of - colors for this painting. c. i can't believe my own - brother! - is now a mayor. d. tom and i - are planning - a wedding in june.