Answer:
The sentence which demonstrates the correct use of elongated hyphens is the following one:
Jessica and her friend baked cookies – chocolate chip and peanut butter – for their club’s bake sale.
Explanation:
The sentence above is the correct one because the elongated hyphens are used to separate additional information without which there would still be a full sentence with a full meaning.
Check it out:
Jessica and her friend baked cookies – chocolate chip and peanut butter – for their club’s bake sale. ↑
(additional information)
If we remove the additional information, there is still a sentence with a full meaning:
Jessica and her friend baked cookies for their club’s bake sale.
The additional information in the present case aims at specifying the kind of cookies Jessica and her friend baked.
