Three-month-old Lionel loved to suck on his fingers. He was quite fond of putting his fingers into his mouth and then pulling them out only to look them over for a minute or two before putting them back into his mouth He repeated this behavior over and over. Lionel's behavior with his fingers illustrates a:.
a. simple reflex.
b. secondary circular reaction.
c. primary circular reaction.
d. tertiary circular reaction.

Brazil trades with the united states more than it does with any other country. industrially, the private sector has made brazil one of the most advanced countries in latin america, with massive investment taking place since 1996. still, over 1 million people live in state-owned housing and millions more are covered by government operated health care. these facts show that brazil has a a) mixed economy. b) market economy. c) command economy. d) traditional economy.