According to "A Letter to my Daughter",what can be inferred from the author’s quitting from various jobs and starting his own business?
选项：

A:He wanted to have real control of his life and live the life that he wanted to.
B:He was not satisfied with his former employers and wanted to be with his family more often.
C:He realized he was not suitable for working in the academic world or in corporations.
D:He wanted to go to China and worked for Google in order to start his own business.