Karl Duncker's experiment with the candle on a vertical board demonstrates that functional fixedness in problem solving can be reduced by .

abraham lincoln issued the preliminary emancipation proclamation on september 22nd, 1862. it stipulated that if the southern states did not cease their rebellion by january 1st, 1863, then proclamation would go into effect.

it would be d). more resources must be obtained to attain that combination of goods and services

on the first day of new student week, amber revealed to her roommate that she is a lesbian. this is an example of self-disclosure.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )