He insisted that psychologists should focus on observable behavior that could be objectively measured and verified. During his long career, he formulated the principles of operant conditioning. A 2002 survey ranked him as the most frequently cited psychologist of all time.

it should be c, women were allowed to vote in all states because federal law supersedes state law.

"states can make their own laws, as long as they don't contradict what the federal law states. the states do not have the authority to pass a law that negates a federal law." -google

. austria-hungary began seizing british colonies in africa.

this question your asking is true hope this and you get a 100 percent : )

protectionism fosters competition and keeps price regulated is not an argument in favor of protectionism.