I think you are right. The form verbs take to express a hypothetical or possible situation.
Answer:
smallpox, measles, typhus, and cholera and On their return home, European sailors brought syphilis to Europe.
Explanation:
answer:it shows that he was convinced that Fred (his son-in-law) was capable of running the project, in addition to believing that family businesses are successful.
Correct me if I’m wrong but I don’t think so. Mysterious and scary are both adjectives so it should’ve gone: The book was mysterious, scary, and humorous. Then, (I think) that sentence would’ve been a parallel structure.