The Boeing 787 Dreamliner utilizes composite materials extensively in its construction, contributing to significant fuel efficiency gains. Which specific property of these composites makes them advantageous for aircraft structures compared to traditional aluminum alloys?

A) Lower density, minimizing overall aircraft weight and fuel consumption.
B) Higher fatigue strength, resisting cracks and damage better during repeated flight cycles.
C) Superior corrosion resistance, eliminating the need for heavy protective coatings.
D) Enhanced thermal insulation, reducing cabin temperature fluctuations and energy usage for climate control.