Question ATPL - Airline Transport Pilot license - Performance

ATPL - According to PART-CAT, which one of the following statements concerning the landing distance for a turbojet aeroplane is correct?

When determining the maximum allowable landing mass at destination, 60% of the available landing runway length should be taken into account.

The landing distance is the distance from 35 ft above the surface of the runway to the full stop.

Malfunctioning of an anti-skid system has no effect on the required runway length.

Reverse thrust is one of the factors always taken into account when determining the landing distance required.