Final answer:
The correctly punctuated sentence is 'Thank you, Sarah, for that delightful dinner.' Commas are used to set off the name of the person being directly addressed. Other sentences were corrected for proper comma usage as they were affected by issues such as joining independent clauses and introducing sentences with dependent clauses.
Step-by-step explanation:
The correctly punctuated sentence from the options is: Thank you, Sarah, for that delightful dinner. This sentence follows proper comma usage by setting off the name of the person being directly addressed, in this case, 'Sarah.' Let's correct the punctuation in other sentences in the provided examples:
- I finally found my keys, and I got to work just in time. (A comma is needed before 'and' when it joins two independent clauses.)
- Mrs. Contreras threw out her old coffee table and cleaned the carpet. (The comma before 'and' is unnecessary because it does not join two independent clauses.)
- Taking the elevator to the roof, we hoped we could see the skyline and the bay. (No comma is needed before 'and' because it does not join two independent clauses.)
- Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy. (A comma is used after the introductory clause and in a list.)
- I let my neighbor borrow my phone because she said hers was tapped by the police. (No comma is needed because the subordinate clause is not at the beginning of the sentence.)