At a dome-style football stadium, sports analysts noticed that as the distance of a field-goal attempt increased, the success rate of a field-goal attempt decreased.
What are the explanatory variable and response variable for this relationship?

a.Explanatory variable: style of stadium
Response variable: distance of field-goal attempt

b.Explanatory variable: style of stadium
Response variable: success rate of field-goal attempt

c.Explanatory variable: success rate of field-goal attempt
Response variable: distance of field-goal attempt

d.Explanatory variable: distance of field-goal attempt
Response variable: success rate of field-goal attempt