The internal or external tension that occurs when you experience dif?culty in meeting important needs is a

In a 0-1 integer programming model, if the constraint x1 - x2 = 0, it means when project 1 is selected, project 2 ________ be selected

A) can also B) can sometimes C) can never D) must also

Zoning regulations are usually administered at the state level

Indicate whether the statement is true or false