(1) As soon as Loraine arrived in town, she phoned Dee. (2) However Dee was not home. (3) Discouraged, by this Loraine walked four blocks to a coffee shop. (4) She hoped Darlene her old friend would be there. (5) When she got to the coffee shop, Loraine found that Darlene was not there. (6) Loraine asked one of the waitresses where Darlene was, and she learned that Darlene had moved to Delaware.

5. Which sentence in the passage contains a parenthetical element that should be set off by commas?

A. Sentence 6
B. Sentence 1
**C. Sentence 4
D. Sentence 2

Yes, C.

To determine which sentence in the passage contains a parenthetical element that should be set off by commas, we need to identify any nonessential or additional information in the sentences. Parenthetical elements are often set off by commas to indicate that they are not essential to the overall meaning of the sentence.

Looking at the sentences:

1. As soon as Loraine arrived in town, she phoned Dee.
2. However Dee was not home.
3. Discouraged by this, Loraine walked four blocks to a coffee shop.
4. She hoped Darlene, her old friend, would be there.
5. When she got to the coffee shop, Loraine found that Darlene was not there.
6. Loraine asked one of the waitresses where Darlene was, and she learned that Darlene had moved to Delaware.

Out of these sentences, Sentence 4 contains a parenthetical element that should be set off by commas. The phrase "her old friend" is additional information that is not necessary for the main meaning of the sentence. Therefore, the answer is C. Sentence 4.