This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Written skills: punctuation
Prompt focus: Which sentence uses commas correctly?
Why the correct answer works
After checking the bag, the officer cleared the passenger for boarding
A single comma after the introductory phrase is correct.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
An introductory phrase should be followed by a single comma, and the correct sentence places that comma right after the introductory phrase.
Simple analogy
Think of written skills: punctuation like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.