I found that the comma in answer choice B made the sentence flow better
you found wrong.
if that's a proper transcription - with just that one comma - then that "sentence" is ungrammatical; it's not even really a sentence.
here's the good word:
"in full view of ground - and space-based telescopes" is a modifier. with such modifiers (occurring in the middle of the sentence), you have exactly 2 options:
* DON'T block the modifier off with commas. (this would be an "essential" modifier, one that must be retained for the sentence to be meaningful.)
* DO block the modifier off, with TWO commas, one on each side. (this would be a "nonessential" modifier, which can be omitted without semantic changes.)
those are all the options. you CANNOT have a comma on one side of the modifier but not on the other side.
(b) is thus ungrammatical, unless an additional comma is placed between "year" and "in".
"forcing" is a problem, because it's being placed in parallel to "provided" (the "and" is the parallel marker). in an "and" construction, you cannot have a participle
(-ing) in parallel with a tensed verb