What is the attitude of the committee built by the British Parliament towards Edison's idea

A．the hope that men could fly long distances through the air would remain a dream
B．it is clear that building a machine by which men shall fly long distances is impossible
C．all physical facts have demonstrated that men can not fly long distances through the air
D．men have not yet learned to produce a flying machine with known substances and known forms of machinery and force

A．Edison's electric bulb was once regarded by some British "experts" as good enough only for Americans.
B．Edison always bad scientific shortsightedness.
C．Edison agreed with the idea of alternating current.
D．Edison thought heavier-than-air flight impossible.