The radius and circumference of several objects were measured. which best describes the strength of the correlation, and what is true about the causation between the variables? it is a weak positive correlation, and it is not likely causal. it is a weak positive correlation, and it is likely causal. it is a strong positive correlation, and it is not likely causal. it is a strong positive correlation, and it is likely causal. the radius and circumference of the objects radius (in). circumference (in) 3. 18.8 4 25.1 6 37.7 9 56.5