Final answer:
Mr. Collins is wistful about not marrying Elizabeth after his proposal is declined and does not encourage her to marry Mr. Darcy. Elizabeth's hopes regarding Mr. Bingley do not match any of the given options, as her character is compassionate and she primarily wishes for her sister Jane's happiness.
Step-by-step explanation:
Regarding how Mr. Collins regards Elizabeth and Mr. Darcy in 'Pride and Prejudice', the most accurate option amongst the choices given would be that Mr. Collins is wistful that he did not get to marry Elizabeth. In the novel, Mr. Collins's proposal to Elizabeth is refused, and his interactions afterward showcase a stiffness of manner and resentful silence. He does not encourage Elizabeth to marry Mr. Darcy, rather he cautions Elizabeth against the match due to Lady Catherine’s disapproval.
When we consider Elizabeth's secret hopes regarding Mr. Bingley marrying Miss Darcy, none of the options provided align well with the text of 'Pride and Prejudice'. Elizabeth's primary concern in the novel is the happiness of her sister Jane, and while a brief moment of pique or jealousy is human, she does not wish for Mr. Bingley to regret losing Jane or for Jane to feel pain. Her character is shown to be compassionate and thoughtful, not spiteful or vindictive.