Which of the following is true of contingency$$ variables?

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Part $1$

A$.$

They refer to a code of ethics that is applicable to all people and all businesses.

B$.$

They refer to situational conditions that impact the relationship between two or more variables.

C$.$

They refer to the set of choices that are available for any decision.

D$.$

They are not an important element of OB$.$

E$.$

They remain constant in every situation.