Forecasting

Using data from twelve European countries, it has been calculated that the correlation between the level
of car ownership and the number of road deaths is 0.73.
Which TWO of the statements shown follow from this?
A)High levels of car ownership cause high levels of road deaths
B)There is a strong relationship between the level of car ownership and the number of road deaths
C)53% of the variation in the level of road deaths from one country to the next can be explained by
D)the corresponding variation in the level of car ownership
73% of the variation in the level of road deaths from one country to the next can be explained by
the corresponding variation in the level of car ownership

Hello,the answer is given B and C
but why?

B and D should be