formula of real GDP

It has been observed in country X that with an increase in college enrollment over a period of six years, the demand for televisions has also increased

Would it be right to conclude that the increase in college enrollment has caused the increase in demand for televisions? Why or why not?

Reinsurance allows ________ to reduce the risks of exposure by allocating a portion of the risk to ________ in exchange for a portion of the premium

A) insurance companies; another insurance company B) insurance companies; the insured C) the insured; the insurance company D) the insured; a bank