**Core Concept**
The attribute risk or disease risk attributable to a specific risk factor (in this case, alcoholism) is a measure of the proportion of disease cases that can be attributed to that risk factor. It is calculated by comparing the incidence of disease in the exposed group (alcoholics) to the incidence in the unexposed group (non-alcoholics).

**Why the Correct Answer is Right**
To calculate the attribute risk, we need to first calculate the incidence of cirrhosis in both groups. The incidence in the exposed group (alcoholics) is 70 cases out of 2100 people (or 70/2100). The incidence in the unexposed group (non-alcoholics) is 23 cases out of 6900 people (since 9000 - 2100 = 6900, and 23 cases out of 6900). We then calculate the attribute risk by dividing the incidence in the exposed group by the sum of the incidences in both groups. This gives us (70/2100) / ((70/2100) + (23/6900)).

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we cannot evaluate it.
* **Option B:** This option is not provided, so we cannot evaluate it.
* **Option C:** This option is not provided, so we cannot evaluate it.
* **Option D:** This option is not provided, so we cannot evaluate it.

**Clinical Pearl / High-Yield Fact**
When calculating attribute risk, it's essential to remember that the formula involves dividing the incidence in the exposed group by the sum of the incidences in both the exposed and unexposed groups. This formula is used to quantify the proportion of disease cases that can be attributed to a specific risk factor.

**Correct Answer:**
Since the question and options are incomplete, I will provide the correct answer based on the calculation described above. However, please note that this is an incomplete explanation as the options are missing.

The attribute risk calculation is (70/2100) / ((70/2100) + (23/6900)) = 70 / (70 + 23/3) = 0.186