8. A clause from sentence (i) has been turned into a(n) _______ in sentence (ii).

(i) Since she knew what the lecture was about, she didn't attend the meeting.
(ii) Knowing what the lecture was about, she didn't attend the meeting.
A. compound predicate
B. infinitive
C. relative pronoun
[D. phrase]

Correct.

is it the phrase

To answer this question, we need to analyze the given sentences and identify the changes that have been made.

In sentence (i), the clause "Since she knew what the lecture was about" functions as an adverbial clause modifying the main clause "she didn't attend the meeting." This clause starts with the subordinating conjunction "since" and provides the reason for her not attending the meeting.

In sentence (ii), this adverbial clause has been transformed into a participial phrase "Knowing what the lecture was about." The verb "knowing" now functions as a present participle modifying the subject "she." This phrase still provides the reason for her not attending the meeting.

Based on this analysis, the answer to the question is [D. phrase], as the adverbial clause has been turned into a participial phrase.