Why did Severus snape die?

What is the problem with the following sentence: cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

Which is not among the style choices a writer would use, if he or she is trying to establish a formal writing style/

Match each feature of an investment with the correct investment. maturity date limited partner closing price flipping the amount a stock ended at for the day arrowright investing in a business without running it arrowright fixing up a property to sell it for a profit arrowright the date the bond expires and the principal is due arrowright