Since the work of thomas and chess, researchers studying temperament no longer group children into categories such as easy, difficult, or slow to warm up, which reflects what is known as a approach to understanding development. rather, researchers now characterize every child along the same set of dimensions of temperament—a approach to understanding development.

A) Between-person.

B) Within-person.

Explanation:

Now researchers focus on the within person approach, in their minds, their context, personal life, individual aspect of the child to understand a development. Before this began to be developed, they used to label them according what they saw on the outside.

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.

answer; ecological fallacy;