Choir is a lot of commitment, but if your good and singing and want to do it go for it.
The responsibility and Lawfulness can come from listening to even just reading rules. A good ci citizen pays the bills and also even can you be a helping hand to the USA by contributing different jobs that they do. USA without helping others is not a waffle citizen or respectful
C. It is the only opinionated answer that needs to be cited.
For the main reason that "it promoted sacrifice for the common good." the speech was commonly read during the Cultural Revolution. This speech was the primary political propaganda of Mao Zedong as a slogan during the dark times of the Chinese cultural history.