Help me please and thank you

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.

Andy bernard laughed at my joke, spitting out his water. complete thought incomplete thought

What’s the answer. i need the answer fast