During an advanced writing workshop, students analyzed the following passage: “While the committee was discussing the proposal that the director had presented during the annual meeting, several members raised objections, which delayed the final decision. The discussion, although intense, revealed that some participants lacked sufficient data to support their arguments. In the end, the proposal that had seemed convincing at first was postponed until further research could be conducted.” The trainees disagreed about the syntactic functions of the clauses, especially the role of restrictive and non‑restrictive relative clauses, as well as the use of subordinate adverbial clauses.

Considering the syntactic aspects of the English language, judge the following items, assuming the perspective of a senior English teacher guiding trainee educators.