d. began to wane as counterculture had become counterproductive.
Explanation:
The hippie movement was started as a youth movement that developed in the united states of America in the mid-1960s, but that, like many movements, has spread all over the world. the hippies were also revolutionaries who made history by speaking up for what they felt was right. It was a unique counterculture and those engaged were not worried about what people consider of them. However, the movement faded away when it became counterproductive.
