Elena can't seem to establish social ties because she is afraid of being embarrassed or appearing foolish. she is easily hurt by criticism and is not willing to go into unfamiliar situations. she may be experiencing:

avoidant personality disorder            

Explanation:

Avoidant personality disorder: The disorder comes under the anxious personality disorders conditions. The avoidant personality disorder is pronounced with the feelings of fear and nervousness. An individual dealing with avoidant personality disorder experience intense fear of being negatively judged or rejection and low self-esteem. It usually starts in infancy or childhood and a child tends to show behaviors like isolation and shyness.

Cause: Environmental factors and heredity factors.

Treatment: Psychotherapy, medication, etc

In the question above, Elena may be experiencing avoidant personality disorder.

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.

because this was the year that the state of israel was formed