Answer:
I believe A is the correct answer.
Explanation:
I would say that the answer should be "Helen's challenges with the frustration of learning to communicate".as a blind-deaf person and the excellent analogy with being shrouded in fog and not having how to determine where she was headed but love giving her the light to find her way and eventually get a degree at university.
The conjunction that bestfits the run-on sentence is
d. and
Because Brutus is deceiving him
