Which constitutional amendment allowed voting by all qualified citizens aged 18 or older?

How have the ideological positions of the two chambers of Congress shifted over the last two decades?

a. Both chambers have become more conservative. b. Both chambers have become more liberal. c. The House has become more conservative, while the Senate has become more liberal. d. The House has become more liberal, while the Senate has become more conservative.

What is meant by the process of coding?

a.) scaling research b.) giving a numerical value to observations c.) recording data d.) measuring the impact of research