Information learned from helped Egyptians develop medical knowledge. I need this answer asap like now!! please

embalming

Explanation:

embalming helped Egyptians preserve bodies for mummification

i would say b. research typically uses a variety of sources

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.