Answer:
One of the most outstanding points in West African history is how geography was influential in the development of this region.
Explanation:
When researching the history of West Africa we can see how the geography of a place is important in the development and relationships that this place presents. This is because the geography of West Africa determined how the population would grow, causing the most populous and most influential villages to settle in the south of the Sahara desert. This happened because this region had a more fertile and well-structured soil for agriculture. These villages, therefore, had good agricultural products because they could establish an exchange trade with the villages that had another type of product.
Promotion could have multiple meanings.
For example, if you say "Mr. Knight got promoted (or got a promotion) from supervisor to manager". There promotion means "raise".
If a product is at promotion there promotion means advertising efforts.
It could also refer to a way to support a cause. For example: There's a campaing supporting healthy lifestyle promotion.
All of the answers are correct so you should select D: All of the above