Sales tax in Cupertino is $9\mathrm{.}13\%.$ Given C$++$ variable naming standards for constants, what is the best variable for this constant.

Group of answer choices

const double cupertino$\_$Sales$\_$Tax $=0\mathrm{.}0913$;

const double CUPERTINO$\_$SALES$\_$TAX $=0\mathrm{.}0913$;

const double cupertino$\_$sales$\_$tax $=0\mathrm{.}0913$;

const double cupertinoSalesTax $=0\mathrm{.}0913$;