Which is a primary risk factor for developing cancer? a. active immune systemb. lack of iron in the dietc. lack of calcium in the dietd. workplace exposure

D. Workplace exposure

The workplace exposure is a primary risk factor for developing cancer. Chemical workers, X-ray technicians, ionizing radiation researchers and asbestos workers are those people who work and are exposed to cancer-causing agents. They must follow all safety precautions and as much as possible, minimize any exposure to such compounds.  

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.