"As the ownership of DVD players goes up, DVD rentals at Blockbuster will also go up." This statement illustrates the concept of:

"As the ownership of DVD players goes up, DVD rentals at Blockbuster will also go up." This statement illustrates the concept of:

"As the ownership of DVD players goes up, DVD rentals at Blockbuster will also go up." This statement illustrates the concept of: 








A. co-dependence.

B. co-alteration.

C. covariation.

D. co-existence.

E. convergence.









Answer: C