In the story "A Girl Named Zippy," the author's mention of candy stripers helps reveal its historical setting primarily because the term "candy striper" was commonly used during the 1950s through the 1980s. Candy stripers were typically high school girls who volunteered in hospitals, wearing striped uniforms, which created a nostalgic connotation that reflects the social and cultural context of that time period. Therefore, the correct option is:
The word candy striper was used in the 1950s through 1980s.