Hmmm........... probably C.
The 13th, 14th, and 15th Amendments, known collectively as the Civil War Amendments, were designed to ensure equality for recently emancipated slaves. ... The 15th Amendment prohibited governments from denying U.S. citizens the right to vote based on race, color, or past servitude
I would say grams because measuring a phone in kilograms would (most of the time) give a 0.# Answer. THIS IS NOT A EXPERT ANSWER, IT IS A THEORY. I think that measuring a phone in grams is the better option.
Sorry if incorrect, I am also learning
Answer:
He created one of the world's first empires.