The question asks to identify ways an insurance company can raise capital. Let's analyze each option: A. Issuing new shares of stock: When an insurance company issues new shares, it sells ownership stakes to investors, directly bringing in cash and increasing its equity capital. This is a direct way to raise capital. B. Reinsuring part of its business: Reinsurance involves transferring a portion of an insurer's risk to another insurer (the reinsurer). By doing so, the primary insurer reduces its exposure to potential losses and, importantly, reduces the amount of regulatory capital it needs to hold against those risks. This frees up existing capital, making it available for other purposes like growth or investment, effectively increasing the company's available capital. C. Selling part of its business: If an insurance company sells a division, a portfolio of policies, or other assets, it receives cash from the sale. This directly increases the company's capital. D. Issuing debt securities: When an insurance company issues debt securities (such as bonds), it borrows money from investors, promising to repay the principal with interest. This is a direct way to raise capital through debt financing. All four options represent valid methods for an insurance company to raise or effectively increase its available capital. Therefore, the correct option is A, B, C, and D. The final answer is $\boxed{\text{A, B, C, and D}}$