Grainger Solutions has branch offices geographically dispersed in seven states. A team has been formed to interact electronically for the purpose of achieving a common goal

Virtual team

Explanation:

Grainger Solutions has branch offices geographically dispersed in seven states. A virtual team has been formed to interact electronically for the purpose of achieving a common goal.

Virtual teamn is a group of people who participate in common projects by  use electronic communication technology to meet from various work base locations towards making collaborative efforts to achieve shared goals and objectives.

think its caste system

explanation:

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."