Sentence Correction

54. According to the professor's philosophy, the antidote to envy is one's own work, always one's own work: not thinking about it, not assessing it, but simply doing it.
(A) one's own work, always one's own work: not thinking about it, not assessing it, but simply doing it
(B) always work; because you don't think about it or assess it, you just do it
(C) always one's own work: not thinking about or assessing it, but simply to do it
(D) not to think or assess, but doing one's own work
(E) neither to think about one's own work nor to assess it, it is always simply doing it

Again unable to understand why the answer is A & not B.

A semicolon can only be used to join two independent clauses. The second clause in B, "because you don't think about it or assess it, you just do it," isn't an independent clause. Therefore, a semicolon is improper as used in that sentence. Also, by assigning causality, B changes the meaning of the sentence. The original sentence states that "the antidote to envy is one's own work... simply doing it." There's nothing in the original suggesting that the antidote to envy is work BECAUSE "you just do it."

Option A correctly uses ":" (colon) suggesting that "not thinking about it, not assessing it, but simply doing it" are related to "one's own work"
Option B changes the meaning of the original sentence and the "you" in the option is ambiguous.

(A) one's own work, always one's own work: not thinking about it, not assessing it, but simply doing it
Correct usage of a colon, The colon is used after an independent clause to introduce a list of items.
Also adhere's to the rules of parallelism thinking, assessing,doing(B) always work; because you don't think about it or assess it, you just do it
Incorrect usage of semicolon
(C) always one's own work: not thinking about or assessing it, but simply to do it
Not a parallel construction
(D) not to think or assess, but doing one's own work
Not a parallel construction
(E) neither to think about one's own work nor to assess it, i
t is always simply doing it
Not a parallel construction

I agree with the correctness of A as it has correct usage of :
But, D is wrong only because of parallelism ?
what if it was:
"not to think or assess, but to do one's own work"

original sentence and other options have too many repeatations of the same expression ! Overdoing Own's work