In What Order Does a Dentist Drill Through Tooth Layers $\rightarrow$

Multiple Choice

In what order does a dentist drill through tooth layers?

A) dentin $\rightarrow$ enamel $\rightarrow$ pulp
B) enamel $\rightarrow$ dentin $\rightarrow$ pulp
C) enamel $\rightarrow$ pulp $\rightarrow$ dentin
D) pulp $\rightarrow$ dentin $\rightarrow$ enamel
E) dentin $\rightarrow$ pulp $\rightarrow$ enamel