The correct answer is B) They were angered that most men older than eighteen were required to register for potential service in the war.
Many Oklahomans grew to disapprove of the Vietnam War because Congress never officially declared war, the US military made little progress, and they were angered that most men older than eighteen were required to register for potential service in the war
Many Americans never liked the idea that the army drafted their kids and loved ones to fight the Vietnam War. People from Oklahoma were among them. And when the news reported that many young American soldiers were dying in the war and no sot much was gained in Vietnam, people started to take the streets to protest and questioned the participation of the US Army in the Vietnam War.