1. which of the following statements are true about public opinion? check all that apply.
a. since, by definition, public opinion includes all of the people, it is considered among the most democratic forms of political participation.
b. public opinion is the aggregate values, opinions, and attitudes held by the public on issues of general concern.
c. elected officials and candidates for political office are rarely influenced by public opinion.
d. public opinion research focuses only on leaders and events, not institutions nor interest groups.

A, B, D

Explanation:

Public opinion express the collective desires and thinking of a majority of people in a society or on some issues, it shows a reflection of what people wants, the belief and intensity they show towards it.

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.