Final answer:
Vera is undergoing withdrawal symptoms as option A is correct, a result of stopping heroin use, which includes extreme pain and psychological distress. These symptoms signify physical dependence on heroin, an opiate that causes severe withdrawal when use is discontinued.
Step-by-step explanation:
Vera is experiencing withdrawal symptoms which are common signs of physical dependence on a psychoactive drug such as heroin. Heroin, part of the opiate/opioid category, causes changes in the body's normal functions and leads to intense withdrawal symptoms when drug use ceases.
These symptoms may include extreme pain, psychological distress, and a sensation of losing control, which are often severe given the potency of heroin.
Methadone is sometimes prescribed to individuals with heroin addiction because it can help reduce cravings and withdrawal symptoms without creating a new addiction.
Users of heroin can develop a tolerance, leading to the need for greater amounts of the drug to achieve the same effects. Withdrawal and drug rehabilitation are difficult processes that can be aided by therapy, support groups like Narcotics Anonymous, and sometimes, substitutes such as methadone.