Which of the following students is best practicing laboratory safety?

A.
Hannah puts her long hair up in a ponytail before lab begins.
B.
Steven washes out a beaker to drink water out of during lab.
C.
Rachel opens and consumes a package of candy during lab.
D.
Jake puts socks on underneath his flip-flops before lab begins.

A. Hannah puts her long hair up in a ponytail before lab begins.