Rules that dictate the dos and don'ts of employee behavior relating to areas such as productivity, customer relations, and intergroup cooperation are characteristics associated with an organization's .

Rules that dictate the dos and don'ts of employee behavior relating to areas such as productivity, customer relations, and intergroup cooperation are characteristics associated with an organization's culture.

Explanation:

The concept of organizational culture is everything that involves the routine of a company and acts as a guideline to guide the behavior and mentality of its members. That is: their practices, habits, behaviors, symbols, values, principles, beliefs, ceremonies, and policies

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."