Evaluate each expression by hand, if possible. Complete parts a through c$.$

a$.log10$

b$.12log0\mathrm{.}001$

c$.log10+log0\mathrm{.}1$

a$.$ Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.log10=$

B$.$ The expression is undefined.

b$.$ Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.12log0\mathrm{.}001=$

B$.$ The expression is undefined.

c$.$ Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.log10+log0\mathrm{.}1=$

B$.$ The expression is undefined.