Answer :
The native Americans made up the largest percentage of California population in 1840.
In the year 1840, the largest group in California as a percentage of population were C.Native Americans.
What was California like in 1840?
California had not been fully explored and settled by the Americans because it was still under Mexico.
As a result, the Native Americans were still free to roam and as a result, comprised the majority of the area's population.
Find out more on California in the 18th century at https://brainly.com/question/498969.