Which statement best summarizes the contributions of al-Khwārizmῑ? He wrote a book about his travels in Africa, Europe, and Asia.
He discovered new treatments for diseases like measles.
He created a book that described the geography of the world.
He developed the study of algebra based on ideas by earlier scholars.

A. He discovered new treatments for diseases like measles.

Explanation:

i just did it

d  the guy above is wrong

Explanation:

have a great day

answer; /// i believe the correct answer is (when one group has an extremely high score at pretest;

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.