Sentence Correction

Accordingto its proponents. a proposed new style of
aircraft could , by skimming along the top of the
atmosphere, fly between most points on Earth in
under two hours.
(A) According to its proponents, a proposed new
style of aircraft could, by skimming along the
top of the atmosphere, fly between most points
on Earth in under two hours.
(8) Byskimming along the top of the atmosphere,
proponents of a proposed new style of aircraft
say it could fly between most points on Earth in
under two hours.
(C) A proposed new style of aircraft could fly
between most points on Earth in under two
hours, according to its proponents, with it
skimming along the top of the atmosphere.
(0) Aproposed new style of aircraft, say its
proponents, could fly between most points on
Earth in under two hours because of its
skimming along the top of the atmosphere.
(E) According to its proponents, skimming alongthe
top of the atmosphere makes it possible that a
proposed new style of aircraftcould fly between
most points on Earth in undertwo hours.

pls explain
- in C what is meaning relation between "with it skimming..." and main clause? and why this meaning relation is wrong.
- what is meaning relation between absolute phrase and main clause ? . Though gmat dose not test hard grammar point, we need to know the relation to find out the ilogic in the sentence.This knowing is not redundant.

some persons said absolute phrase has not semantic relation with main clause. I am confused here. pls explain.