Amphetamines carry a risk of physical dependence or addiction.
a. high
b. possible
c. moderate

The answer is letter A.  

Amphetamines carry a high risk of possible dependence or addiction. These are stimulant and appetite suppressant drugs that affect the central nervous system by increasing amounts of certain chemicals within the body. It may treat conditions like narcolepsy and attention deficit disorder with hyperactivity. But it must only be used under the prescription of a doctor.  

It has a high risk of being abused because it may cause physical and psychological dependence. The drug can also lead to withdrawal symptoms if a person decides to suddenly stop using it. 

Cis the most source of vitamins

Think it's rice because in many countries rice is the main food so it can be traditionally served all at once.