Because of brazil’s past decision to focus on instead of over 20% of its population was illiterate in 1990.

a. commodity production . . education
b. education . . agriculture
c. industry . . farming
d. trade . . service

The correct answer is A. Because of Brazil’s past decision to focus on commodity production instead of education, over 20% of its population was illiterate in 1990.  

Explanation:

Brazil has census data on illiteracy since the end of the 19th century. Since then, rates have been gradually decreasing: from 65.3% in 1920, to reaching a minimum of 13.6% in 2000. In none of the periods is evident that a steeper decline can be attributed to some of the massive campaigns against illiteracy undertaken throughout the 20th century. All indications point to the fact that the decline was the result of the constant expansion of public education systems and, secondly, gradual progress in the field of adult education. It is also important to note that due to the global population growth, the absolute number of illiterates only began to fall during the 1980s.

Sumer and ancient civilizations.

Explanation:

The origins of slavery ​were Sumer and ancient civilizations. Slavery occurred in civilizations of Sumer, as well as in almost every ancient civilization, such as ancient Egypt, ancient China, the Akkadian Empire, Assyria, Babylonia, Persia, ancient Greece, ancient India, the Roman Empire, the Arab Islamic Caliphate and Sultanate and the pre-Columbian etc. The slavery was started because there is need for it in every society and civilization for the purpose of work.