Which sentence is the central idea of the paragraph?
(A) Here are the three worst things that you can do on a date. (B)First, you could tell jokes that aren't funny and laugh really hard to yourself. This will make you look bad. Worse though, you could offend your date. One bad "joke" may cause your date to lash out at you, hence ruining the engagement. (C)But the worst thing that you can do is to appear slovenly. (D)By not showering and properly grooming, you may repulse your date, and this is the worst thing that you can do.