Answer: b. Riskier over time, and its value will decrease
Explanation:
Because the company is using the investor's required rate of return instead of one that takes into account the riskiness of the two division, you find that risk is not being adequately accounted for.
This would lead to a situation where the company becomes riskier because it is not accounting for its risk properly. With higher risk, the company will be unable to seek funding easily which would lead to lower investments being undertaken and an overall decrease in company value.