A - correct answer.
"reported" and "announced" are parallel to each other.
B - "surpassing wall street's estimates" is a comma + -ing modifier at the end of a sentence.
It modifies the subject of the preceding clause - "the report of the computer company".
"they" does not have a logical referent.
"price cuts that they(the company) intend to increase sales further" - does not make any sense.
C - modifier error. "Surpassing Wall street's estimates" should have modified "earnings".
"they" does not have a logical referent.
D - "surpassing Wall Street's estimates" modifies "the computer company". Illogical.
"and" requires parallelism. "and announcing" is not logically parallel to anything. Note that if it were parallel to "surpassing", the comma before the "and" would not be necessary.
E - "surpassing wall street's estimates" modifies "the computer company".
"announcing that ..." seems to modify "there would be the first in a series of price cuts". - Modifier error.
"announcing that ..." should apply to the "the computer company".
"...to increase sales further, there would be the first in a series of price cuts" - this seems to imply that only the first price cut would contribute to increased sales.
Usage of "while" (= at the same time as) does not make sense here. "reporting" and "announcing" did not happen at the same time.