Select the CORRECT statement$($s$)$ regarding normal microbiota of the skin.

Question $23$ options:

a$)$

They are often Gram positive.

b$)$

They are often facultative halophiles.

c$)$

The most common genera are Staphylococcus and Bacilli.

d$)$

a and b

e$)$

a$,$ b$,$ and c