Which of the following factors is most likely the reason why regulators closely monitor the insolvency risk of insurance companies?

The GrammLeachBliley Act prohibits financial institutions to combine insurance and banking services.

Insurance firms tend to be unprofitable as they shift policy risk to reinsurers.

Insurers have incentives to increase premiums once they acquire a dominant position in insurance markets.

Insurance premiums are collected before insurers pay for underwriting expenses and policy losses.