What essential information is typically included in an investment company's prospectus?

An investment company’s prospectus is a critical document that provides potential investors with vital information about the fund. This document encompasses a thorough overview, which typically includes details about the management fees, potential risks associated with the investment, and the various services offered to investors. Understanding these elements is essential for investors to make informed decisions about whether to invest in the fund.

The inclusion of fees in the prospectus allows investors to understand the costs associated with their investment, which can significantly affect long-term returns. Meanwhile, information about risks helps investors gauge what they may face should they choose to invest, ensuring they're aware of the potential for loss or fluctuation in their investment values.

While comparisons to competitors or historical performance can be helpful in certain contexts, they do not encompass what is considered essential for initial decision-making by investors. Therefore, the key aspects that guide investors in understanding a product’s structure, limitations, and management are prominently highlighted in the prospectus, reinforcing choice B as the correct answer.