Answer:
A. Abdominal
Explanation:
When you perform a crunch, you are exercising your core, also known as your abs.
Your abs are located in between the ribs and pelvis. This area is also called your abdomen.
When you work your core, the fat and flab on your stomach will eventually slim down and you will begin to see the muscles under the fat.
Those exposed muscles are called abs.
...the fact that they are a physical contaminant.
The exact mechanism of immune complex formation is unknown.
