sorry here. i am having some other opinions.
i think for this question, none of the options seems to be right.
for A , paul has taken some assumption which is not stated or implied in the passage. actually , here none of the options seems to be correct to me.
However for me also A is right with some other reasoning
C,D,E - are very strong
C - each of
D - never before
E - all of the
B - never stated or compared with other airplane
A - take it granted. least no of problems.