Which sentence uses the words among/between correctly? a. our group divided the research tasks between the group members. b. the student leadership group was never really successful because they were always fighting among themselves. c. the fights among my sister and i were always really upsetting. d. the sense of competition among the two runners was palpable.

This is the correct  B. The student leadership group was never really successful because they were always fighting among themselves.

The difference in using among vs. between is that generally between is used for specific items and individuals, whereas among is used for things that are not distinct items or when talking about a group of people. A, is talking about a group of people so it should be among. C, is talking about two specific people, so it should be between. D, is talking about two specific people so it should be between. Therefore, B is the correct answer.

This act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.