Break this sentence into simpler form through burn and slash (burn or slash what ever is not needed/ is additional information)
The evidence of water on the surface of Mars,
away from the polar ice caps, obtained by recent photos
of the Martian surface is so much stronger than atmospheric data once trumpeted as proof of water on Mars, and so many astronomers are calling it the first proof of Mars having non-polar water.
(A) once trumpeted as proof of water on Mars, and sonot parallel, run on sentence
(B) once trumpeted as proof of water on Mars thatSimple form 'So.... that'
(C) once trumpeted that it is proof of water on Mars, and soMeaning, who trumpeted? not clear
(D) that they had once trumpeted as proof of water on Mars, so thatThey had? who is they refering to? pronoun error
(E) that they had once trumpeted as proof of water on Mars, andPronoun error