Identify the option that most appropriately combines both the given sentences into one sentence.
He undertook the difficult task. He did so albeit the fact that he did not have any spare time.

Correct option is A

The correct option is (a) because the phrase "in spite of the fact that" appropriately shows the contrast between his lack of time and his decision to undertake the task. It reflects that he completed the task despite having no spare time.
Option (b) introduces an incorrect cause ("because"), option (c) is not logically structured, and option (d) uses the phrase "nevertheless for the fact" incorrectly.