The most important
development is that
they decide to get
married.
"<span>She had come to San Francisco in 1949 after losing everything in China. But she never looked back with regret."
Or rather,
"S</span>he never looked back with regret."
A) Is not always directly stated.
Sometimes the main idea is implied instead of directly stated. You can also get the main idea from the Theme which is stated at the end of the first paragraph.
i hope i helped:)