**Core Concept**
Relative risk is a statistical measure used to compare the risk of a particular outcome between two groups, typically an exposed group and a non-exposed group. In this context, a relative risk of 5 implies a significant increase in the risk of a specific outcome in the exposed group compared to the non-exposed group.

**Why the Correct Answer is Right**
A relative risk of 5 indicates that the exposed group has 5 times the risk of the non-exposed group. This means that for every 1 individual in the non-exposed group who experiences the outcome, 5 individuals in the exposed group will experience the outcome. This is a strong association between the exposure and the outcome, suggesting a potential causal relationship. The relative risk of 5 is often considered a significant increase in risk, warranting further investigation and potential intervention.

**Why Each Wrong Option is Incorrect**
**Option A:**
This option is not directly related to the concept of relative risk and does not provide a valid interpretation of a relative risk of 5.

**Option B:**
This option is incorrect because it implies a relative risk of 5 is equivalent to a 5% increase in risk, which is not the case. A relative risk of 5 represents a much stronger association between the exposure and outcome.

**Option C:**
This option is incorrect because it implies a relative risk of 5 is equivalent to a 5-fold decrease in risk, which is the opposite of the correct interpretation.

**Clinical Pearl / High-Yield Fact**
When interpreting relative risk, it's essential to consider the baseline risk of the outcome in the non-exposed group. A relative risk of 5 may be more or less significant depending on the baseline risk, and it's crucial to evaluate the absolute risk increase in addition to the relative risk.

**Correct Answer: B. This option is incorrect because it implies a relative risk of 5 is equivalent to a 5% increase in risk, which is not the case.**