DrZelke Surveys 50 University Students to Discover the Relationship Between

Dr.Zelke surveys 50 university students to discover the relationship between textbook price and ratings of readability.Dr.Zelke finds that for these two variables,the correlation coefficient is -0.70.What does this indicate

A)  More expensive books tend to receive lower readability ratings than less expensive books. 
B)  Increasing the price of a book will lead people to think that it is more readable. 
C)  Less expensive books tend to receive lower readability ratings than more expensive books. 
D)  There is no relationship between book price and ratings of readability.