$9)$ To declare a constant TAX$\_$RATE with value $0\mathrm{.}98$ inside a method, you write $\_\_\_.$

A$)$ final long TAX$\_$RATE $=0\mathrm{.}98$; B$)$ final double TAX$\_$RATE $=0\mathrm{.}98$;

C$)$ double TAX$\_$RATE $=0\mathrm{.}98$; D$)$ final TAX$\_$RATE $=0\mathrm{.}98$;

$10)$ According to Java naming conventions, which of the following names could be a variable?

A$)$ class B$)$ TOTAL$\_$LENGTH C$)$ findArea D$)$ Radius