Which line of code should replace the placeholder symbols $"???"$ in order to terminate the loop when the first grade greater than or equal to $90$ is encountered?

int count $=0$;

bool found $=$ false;

int grade;

while $(!$ found && $($cin $>$ grade$))$

$\{$

$???$

$\{$

$???$

$\}$

else count$++\}$;

$\}$

if $($grade $90)$

$\{$

found $=$ true;

$\}$

if $($grade $90)$

i

count$--$;

$\}$

if $($grade $90)$

$\{$

found $=$ true;

$\}$

If $($grade $=>90)$

$\{$

found $=$ true;

$\}$