How do Class A shares differ from Class B shares in an open-end investment company?

Class A shares and Class B shares in an open-end investment company differ primarily in their fee structures, which directly impacts how investors face costs when purchasing or redeeming shares. Class A shares typically come with a front-end sales charge, meaning that a percentage of the investment amount is deducted upfront when shares are purchased. This structure may benefit long-term investors, as the shares may have lower ongoing expenses.

On the other hand, Class B shares generally feature a contingent deferred sales charge (CDSC) that applies if the shares are sold within a certain time frame after purchase. This means that while no upfront commission is paid when investing in Class B shares, investors might face fees upon selling if they do so before a predetermined period. Over time, Class B shares often convert to Class A shares, typically after a certain period, which can reduce ongoing fees.

This distinction in charging structures makes answer B a correct reflection of how Class A and Class B shares function within an open-end investment company.