you are both wrong the right answer is the taklamakan desert.
Answer: Its the third option The United States Colored Troops Regiments
Hope it helps :)
Answer:
Accounts of a vast inland sea, and the discovery of the snow-clad mountains of Kilimanjaro in 1840–1848, stimulated the desire for further knowledge about Africa in Europe. ... Between 1851 and 1856, he traversed the continent from west to east, discovering the great waterways of the upper Zambezi River.
Explanation: