Question $3(1$ point$)$

While driving at night, a driver saw something moving on the road ahead. It took him $0\mathrm{.}5$ seconds to identify it is a deer crossing the road. Then he spent another $1\mathrm{.}0$ seconds to decide to stop the vehicle. It took another $0\mathrm{.}5$ seconds for him to press on the brake pedal. What is the perception reaction time in this particular case?

$0\mathrm{.}5$ seconds

$2\mathrm{.}0$ seconds

$1\mathrm{.}5$ seconds

none of the above