What does a candidate have to do to be nominated for president?

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

What is an attack against a country called?

What has contributed to the growth of agriculture as big business in the midwest