Community psychologists intervene at the primary level when they design prevention programs for potential problems before the problems actually occur design prevention programs for potential problems before the problems actually occur A deinstitutionalize individuals through the use of halfway houses deinstitutionalize individuals through the use of halfway houses B treat currently existing problems before they reach epidemic proportions treat currently existing problems before they reach epidemic proportions C treat currently existing problems only after they have reached epidemic proportions treat currently existing problems only after they have reached epidemic proportions D treat a disease in an attempt to slow the spread of it

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.