How much percentage should a savings account with an EAR of $10\%$ earn semi$-$annually? $($Round to two decimal places$)$

a$.21\mathrm{.}00$

b$.2\mathrm{.}41$

C$.3\mathrm{.}89$

d$.4\mathrm{.}88$

e$.54\mathrm{.}88$