It's B dude. A. isn't right and b just seems the most reasonable.
<h2>
<u>Question</u><u>:</u><u>-</u></h2>
I understand that i could not rely upon her to get a job done. (change into paasive)
<h2>
<u>Answer</u><u>:</u><u>-</u></h2>
The passive voice always uses the past participle form of the main verb irrespective of any tense.
So the sentence will be- I could not rely upon her to get a job done, I understand.
<h3>
~</h3>
C & E are the 2 correct answers everything else is wrong.