Which of these advances did ancient egyptians make? a. created a calendar based on the stars that included 12 months b. invented the sailboat c. used iron tools for the first time d. correctly identified all human organs

How does the principle of federalism affect the u.s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d.it divides the federal and state governments into three branches