A Researcher Observes That the Frequency of Traffic Accidents Increases

Multiple Choice

A researcher observes that the frequency of traffic accidents increases in warmer weather.This researcher need to consider whether there are more cars on the road when it is warmer.This "number of cars" variable must be considered to determine if the relationship between traffic accidents and temperature is

A) due to selective survival.
B) spurious.
C) a causal relationship.
D) due to physical traces.