Describe how schools use no-tolerance policies.

Aperson who doesn't have enough calcium in his or her diet is at risk for developing bones that are weak and break easily. this condition is known as  a.  osteoporosis.    b.  crohn's disease.    c.  celiac disease.    d.  hemophilia.

True or false? the usa has one of the safest food supplies in the world

Which of these gives the best indication that a health service is based on pseudoscience?