Final answer:
The correct answer is an asset management account, which is a comprehensive financial service offering various features including checking and investment services.
Step-by-step explanation:
An asset management account is an all-in-one financial account that provides a variety of services, including checking, savings, and investment services, among others. Money market accounts, similar to savings deposits, are a part of M2, which means they're part of a classification of money that includes less liquid types of assets than those in M1. However, despite the fact that money market accounts offer various financial services, they are not as comprehensive as an asset management account, which is why the best answer is D).
Mutual funds, while an important investment vehicle, arranging a diversified portfolio of stocks or bonds, do not provide the broad range of financial services associated with an asset management account. They, however, do afford investors an easy way to diversify their holdings and achieve potential returns based on the collective performance of a fund's assets.