Select the most appropriate option to fill in the blanks.
His (1)__ speech was clear, (2)___ and passionate, leaving a (3)___ impression on the audience during the conference._

Correct option is C

The sentence describes the qualities of a speech and the impact it had on the audience. The correct flow must reflect logical sequencing and appropriate adjective-noun pairings.
Let’s analyze each blank:
(1) Persuasive speech
✔️ A persuasive speech is one intended to convince the audience.
✔️ "Clear, well-structured, and passionate" are traits of effective persuasive speech.
❌ “Lasting speech” or “well-structured speech” doesn’t focus on the emotional or rhetorical impact.
Example: “His persuasive speech changed many minds.”
(2) Well-structured
✔️ "Well-structured" is best used to describe the organization or clarity of the speech.
✔️ Placed after “clear” and before “passionate” fits logically.
❌ “Lasting” or “persuasive” used here would be awkward in this position.
Example: “A well-structured speech helps the audience follow the argument easily.”
(3) Lasting impression
✔️ “Leaving a lasting impression” is a very common phrase meaning the audience remembered it long after.
❌ “Persuasive impression” or “well-structured impression” is not idiomatic.
Example: “Her performance left a lasting impression on everyone.”
Why the other options are incorrect:
(a) (1) lasting speech – ❌ odd usage; (3) well-structured impression – ❌ doesn’t collocate naturally.
(b) (1) persuasive – ❌ followed by “lasting” which doesn’t modify the right element; (3) well-structured impression – ❌ awkward.
(d) (1) well-structured – ❌ not the best first adjective; (3) persuasive impression – ❌ unnatural phrase.