Final answer:
The correct sentence is b: 'Well, I think we should ask for help.' Commas are important for clarity and conforming to punctuation rules, especially to separate introductory words from main clauses and elements in a series, or after a dependent clause preceding an independent clause.
Step-by-step explanation:
The correct sentence that uses a comma properly is option b: Well, I think we should ask for help. When starting a sentence with an introductory word such as 'Well', it's important to follow it with a comma to separate it from the main clause of the sentence for clarity and to conform to standard English punctuation rules.
Let's look at how to insert or omit commas in some example sentences:
- I finally found my keys, and I got to work just in time.
- Mrs. Contreras threw out her old coffee table and cleaned the carpet.
- Taking the elevator to the roof, we hoped we could see the skyline and the bay.
- Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
- I let my neighbor borrow my phone because she said hers was tapped by the police.
Regarding the use of commas, there are a few rules to remember:
- Use the comma to separate three or more elements in a series. Place a comma before the last item if you choose to, but remain consistent throughout your writing.
- Use a comma after a dependent clause when it comes before an independent clause. Exceptionally, if the dependent clause follows the independent one and no contrast is implied, you may omit the comma.