The sentence to be processed is: "She gave a beautiful speech, which everyone enjoyed it." The phrase requiring correction is underlined: which everyone enjoyed it. The objective is to select the most accurate alternative from the provided options.
The grammatical problem lies in the nonrestrictive relative clause. The inclusion of "it" after "which" is redundant because "which" already refers to speech. The pronoun "it" is thus superfluous.
An effective alternative is needed to connect the main and relative clauses without redundancy. Consider the following options:
Analysis of options:
The most grammatically sound choice is: that everyone enjoyed. The corrected sentence reads: She gave a beautiful speech, that everyone enjoyed.