A Study Tracking School Violence Shows That Rural Schools Had

A study tracking school violence shows that rural schools had an average of 4 documented violent episodes in the past school year, suburban schools had an average of 17 such episodes, and urban schools averaged 23 violent episodes. If in an ANOVA test the F (observed) statistic exceeded the F (critical) value, which of the following would we conclude about the relationship of regional context to school violence?

A) Urban schools report more violent episodes than suburban schools, and suburban schools report more violent episodes than rural schools.
B) Suburban schools report more violent episodes than rural schools, but the difference between suburban schools and urban schools is non-significant.
C) Urban, suburban, and rural schools do not report identical numbers of violent episodes.
D) There is no significant difference in violent episodes reported by urban, suburban, and rural schools.