What is the final value stored in variable $x$ below?

double $a=-6\mathrm{.}35$

double $x=$ Math.abs$($Math$.$ceil$($a$))$;

$6\mathrm{.}0$

None of the other answers

$-6\mathrm{.}0$

$5\mathrm{.}0$

$7\mathrm{.}0$