The diagram illustrates the proportions of injecting and non-injecting drug users who have HIV/AIDS in one specific region of the world. What explains the difference between these two groups of drug users?
- ACondoms are used more often by injecting drug users.
- BInjecting drugs is more common in areas of dense population.
- CThe same needle may be used by several injecting drug users.
- DThere are more injecting drug users than non-injecting drug users in this part of the world.