Do not make the same mistake as me or Derekhall16. I got this wrong, but it still showed me the correct answer.
Answer:
Using Indices - the Human Development Index
The HDI combines data for life expectancy, adult literacy and GDP per capita (a country's wealth divided by its population) to produce one single measure that is put on a scale from zero to one, where a scores closer to one indicate higher levels of development.
Answer:
A. Swahilli
Explanation: Swahili developed as a common coastal language as early as the thirteenth century and has been greatly influenced by Arabic. It easily incorporates foreign words (primarily from Arabic, Hindi, Persian, and English) and consequently has been considered the most flexible of all languages in East Africa.