While preparing a sample for an experiment, Gomer accidentally cuts his hand with a scalpel. Richard, his lab partner, immediately runs to get the teacher's attention. What should Gomer do to stop his hand from bleeding?
A.
Press a clean towel or cloth firmly against the cut.
B.
Nothing, let the blood coagulate and stop itself.
C.
Wash the cut with any liquid that is nearby.
D.
Lie down and raise his arm straight up.