Hi All,

In the below question, the correct answer is "E". Can somebody please help me understand what is wrong with "A" and "D" ?

In the early days of the manned space programs, three astronauts died in a fire before engineers discovered that a mixture of oxygen and nitrogen, rather than pure oxygen, will be breathable and less incendiary.

a) will be breathable and less incendiary.
b) breathes better than it burns.
c) was less incendiary than breathable.
d) to be breathable rather than incendiary.
e) would be breathable and less incendiary.

Thanks
Mohit