Geologists May Choose to Lick a Mineral to Identify It

Geologists may choose to lick a mineral to identify it. What mineral is the geologist expecting with this test?

A) NaCl halite. or KCl sylvite.
B) a sulfide bearing rock which will taste like rotten eggs
C) None, it clears the dust off the sample so he/she can see if more clearly.
D) None, they are clearing the hydrochloric acid from the sample to rerun a test for calcite.