[Solved] Plantation workers served contracts of indenture that usually lasted A)one to two years. B)two to four years. C)five to seven years. D)eight to ten years. E)ten to twelve years. Adverse Effect: An undesired, harmful effect resulting from a medication, treatment, or intervention. Depressants: Drugs (such as alcohol, barbiturates, and opiates) that reduce neural activity and slow body functions. Barbiturates: A group of drugs that act as central nervous system depressants, often used for their sedative, hypnotic, and anticonvulsant properties. Erotic Movie Clip: A short segment of film designed to provoke sexual arousal or interest.