"Nigeria remains more densely populated than other African countries" is the conclusion that can be drawn about changes in Africa's population between 1960 and 2000.
The image shows two demographic maps of Africa showing the number of people in millions according to color. The places that have light yellow are the places with the least amount of population, while the areas in red and dark purple tones are the places with the most people.
According to this, it can be inferred that Nigeria is one of the most populated countries in Africa because most of its territory is in red and dark red, showing the high density of people.
So, the correct answer is B. because this option shows a conclusion that corresponds to what is illustrated in the images.
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