A correlation coefficient for the Average Study Time per Day and the Average UK Inflation Rate per Day is $r=0\mathrm{.}81.$

Based on this information indicate which of the following statements is logically correct $($only one answer is correct$)$

a$.$ The higher the Average Study Time per Day the higher the Average UK Inflation Rate per Day will be

b$.$ Although we can calculate a correlation coefficient for any sets of data it does not always make sense, there is no causal relationship $($spurious correlation$)$

c$.$ There is a strong positive relationship between the Average Study Time per Day and the Average UK Inflation Rate per Day