**Explanation:**

In reinforced concrete design, the maximum strain in the tension reinforcement at failure is an important consideration. This strain is typically limited to ensure the safety and ductility of the structure.

The maximum strain in the tension reinforcement can be calculated using the formula:

ε_max = (fy / 1.15Es) * ρ

where:
- ε_max is the maximum strain in the tension reinforcement
- fy is the yield strength of the reinforcement
- Es is the modulus of elasticity of the reinforcement
- ρ is the reinforcement ratio

**1. Limiting the maximum strain:**

Limiting the maximum strain in the tension reinforcement is important to ensure that the reinforcement does not fail in a brittle manner. By limiting the maximum strain, the reinforcement is allowed to undergo ductile behavior, which provides warning signs of impending failure and gives the structure a chance to redistribute the loads.

**2. The factor of safety:**

The factor of safety of 1.15 is commonly used in reinforced concrete design to account for uncertainties in material properties, construction, and loading conditions. By dividing the yield strength of the reinforcement by 1.15, a conservative estimate of the maximum strain is obtained.

**3. The reinforcement ratio:**

The reinforcement ratio, ρ, is the ratio of the cross-sectional area of the tension reinforcement to the total cross-sectional area of the concrete section. It is an important parameter in determining the maximum strain in the tension reinforcement.

**4. The correct answer:**

Option A, ((fy / 1.15Es) * 0.002), is the correct answer because it correctly represents the formula for calculating the maximum strain in the tension reinforcement at failure. It considers the yield strength of the reinforcement, the modulus of elasticity, and the reinforcement ratio, while also accounting for a factor of safety of 1.15.

By using this formula, designers can ensure that the tension reinforcement in the section is not subjected to strains that exceed its capacity, thus ensuring the safety and ductility of the structure.