How many promotion zones are recognized for soldier promotions?

The correct answer identifies that there are two promotion zones recognized for soldier promotions. This distinction is critical because it separates eligible soldiers into two primary categories based on their time in service and time in grade. The two promotion zones are typically categorized as the primary zone, which includes soldiers who meet the minimum requirements and are at the forefront of promotion consideration, and the secondary zone, which encompasses those who may not yet meet all the criteria but still have potential for promotion. Understanding these zones helps soldiers navigate their career progression effectively and prepares them for the opportunities available within the Army's promotion system.