Question ATPL - Airline Transport Pilot license - Performance

ATPL - With regard to the drift down performance of the twin jet aeroplane, what is meant by 'equivalent gross weight at engine failure'?

The increment represents fuel used before engine failure

The equivalent gross weight at engine failure is the actual gross weight corrected for OAT higher than ISA +10°C

The increment accounts for the higher fuel flow at higher temperatures

This gross weight accounts for the lower Mach number at higher temperatures[see Annex]