Ah how does hand washing decrease the microbes present on your hands?

it kills microbes and then removes them.
it removes viruses but not bacteria from them.
it kills the microbes but does not remove them.
it removes the microbes but does not kill them.

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "