Each question is divided into four parts where one of the parts may or may not contain an error. Choose the part that has the error as your answer. If all the parts are correct choose “No Error”.

The speaker delivered her (A)/ presentation so confident that the (B)/ entire audience was captivated by her words, (C)/ nodding in agreement and appreciation. (D)

The correct answer is B.

Step-by-Step Breakdown:

1. Analyze Part (A): "The speaker delivered her"
This part introduces the subject ("The speaker") and the transitive verb ("delivered") along with the possessive pronoun ("her"). There are no grammatical errors in this segment.

2. Analyze Part (B): "presentation so confident that the"
This part contains a grammatical error. The word "confident" is an adjective. However, it is used here to modify the verb "delivered" (describing how she delivered her presentation). An adverb is required to modify a verb, not an adjective. Therefore, "confident" should be replaced with the adverb "confidently".

3. Analyze Part (C): "entire audience was captivated by her words,"
This part forms the result clause following "so... that". "Entire audience" correctly acts as the subject, followed by the singular passive verb phrase "was captivated". There are no errors here.

4. Analyze Part (D): "nodding in agreement and appreciation."
This part uses a present participial phrase ("nodding...") to modify the audience's action. The structure and prepositions are used correctly.

Corrected Sentence:
"The speaker delivered her presentation so confidently that the entire audience was captivated by her words, nodding in agreement and appreciation."

Hence, the error lies in part (B).