Read this excerpt from a student’s essay about an historical event. Which cause would have produced an effect of redesigning the spacesuits worn by the astronauts to eliminate as much nylon as possible? The house report attributed the astronauts’ deaths to multiple issues, including a pure oxygen atmosphere, flammable materials, poor hatch design, and inadequate emergency preparedness.

A: inadequate emergency preparedness

B: poor hatch design

C: pure oxygen atmosphere

D: flammable materials