What are some countries with a rigid constitution

Discuss the main ideas of eugenics, and explain why it is no longer a prominent belief in the united states.

Can someone me out with this , i'm putting 30 points on it

If the imperial dynasty had continued to rule china, it is most likely that a) the economy would have improved rather than weakened b) european nations would have gotten more of a foothold in china c) revolutionary groups would not have gained any power in the country d) communism would not have received support among the poor