How does Rule 1.15 mandate a lawyer to handle client property?

The answer is accurate because Rule 1.15 of the Model Rules of Professional Conduct explicitly requires lawyers to maintain client property in a manner that ensures it is separate from the lawyer's own property. This rule mandates that client funds must be held in a separate trust account, and lawyers must maintain accurate records of these funds.

Keeping client property separate not only protects the client's interests but also helps to prevent the commingling of client funds with the lawyer's own funds, which could lead to ethical violations. The requirement for proper accounting ensures transparency and accountability in handling client property. Law firms are obligated to give an accurate accounting upon the request of the client regarding any property or funds held on their behalf. This principle is fundamental to ensuring trust in the attorney-client relationship and upholding the integrity of the legal profession.

The other answer choices reflect misunderstandings of the rules governing lawyer conduct. For instance, pooling client property with the firm's funds would violate the requirement for separation, and allowing lawyers to use client property for business expenses would also breach fiduciary responsibilities. Furthermore, simply requiring basic recording of transactions would not suffice, as detailed and accurate accounting is a crucial aspect of managing client property.