The students _______ completed the advanced course _______ will be eligible for the research program.
Which choice completes the text so that it conforms to the conventions of Standard English?
, who completed the advanced course,
who completed the advanced course
, who completed the advanced course
who completed the advanced course,
Correct Answer: B
Choice B is the best answer. This question tests distinguishing essential from nonessential clauses.
- Context clues: The clause identifies WHICH students are eligible—it's essential information.
- Meaning: Essential (restrictive) clauses are NOT set off by commas.
- Verify: "The students who completed the advanced course will be eligible" correctly limits which students.
💡 Strategy: If removing the clause changes the meaning, it's essential and needs no commas.
Choice A is incorrect because commas would make the clause nonessential, changing the meaning. Choice C is incorrect because it lacks logical consistency (one comma suggests nonessential). Choice D is incorrect because a single comma after the clause is grammatically incorrect.