My first line of thought was less flaps, higher speed on the approach. Less flaps increases your Vref doesn't it? But that wasn't a possibility in the db so remembered the answer given and since then have been
And thinking about it if fly a higher speed on the approach, won't your speed over the threshold be higher? Or do we slam on the breaks to cross the threshold at Vref?
A lower flap selection will increase your approach speed and landing distance, however in a strong wind on a performance limiting runway the extra wind will reduce your ground speed so depending on type cancel each other out. Good discussion point
As a penalty for learning the answer (D) you can answer this
Very Gusty crosswind
at 90 degrees to the runway s what flap setting would you select, reduced flap setting makes the runway nearly performance limited, normal flap landing distance is OK. Its an airmanship Q not a performance Q