"<span>It may be one, none, or multiple of the sources we listed" I would just make that part shorter. Make it something like "It could be any of the sources we listed" instead. It didn't make sense with how you listed them and it seems like you're just trying to add more words to meet the quota. </span>
The pronoun that correctly completes the sentence is option B. Whoever.
The complete sentence should be: Thank whoever brought this delicious fruit salad to dinner. We used "whoever" instead of whomever because it is used as a subjective pronoun. Whomever is used as an objective pronoun.
Do you have more information to go with this?
When you drink, and when you are tired
