Research is designed to capture cause-and-effect relationships by eliminating competing explanations of the observed findings./

"Experimental" research is designed to capture cause-and-effect relationships by eliminating competing explanations of the observed findings.

Experimental research is intended to catch cause-and-effect connections by dispensing with contending clarifications of the watched discoveries. On the off chance that the experiment is very much planned and executed, research and showcasing chiefs can believe in the ends. Experiments call for choosing coordinated gatherings of subjects, subjecting them to various medicines, controlling superfluous factors, and checking whether watched reaction contrasts are factually critical.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.