Either b or d, but i think your best bet is with d.
It is the reason something exist for example if you ask what the purpose of a car is you would say its purpose is to get me from one place to another.
Answer:
A map of Africa
Explanation:
Including a map of Africa with this text would provide the best support for the details in the excerpt. In this text, we learn about the journey that Livingstone was going to undergo in Africa. Livingstone was going to explore the East side of the continent, and travel 260 miles upriver to the town of Tete. The reader would most benefit from a map in which he could trace Livingstone's journey.
Logos is appeal to reason or logic. It uses facts and evidence to convince a reader or listener of the strength of your argument.
