Elizabeth believed that Jane and Bingley would most certainly form a very happy couple. What were the grounds for her beliefs?

Jane Bennet, the oldest Bennet daughter, is beautiful, good-tempered, amiable, humble, and selfless. Her good nature does result in a level of naiveté, especially when it comes to recognizing the wickedness of othersJanes's  sweetness leaves her vulnerable to injury from insincere friends like Caroline Bingley. A rather static character, Jane remains a model of virtue throughout the novel.Much like his beloved Jane, Charles Bingley is an amiable and good-tempered person, mostly unconcerned with class differences despite his extraordinary wealth. His virtue proves to be his vice at times, since his modesty leads him to be easily swayed by the opinions of others. A mostly static character, Bingley remains pleasant and in love with Jane throughout the novel.