What condition is required under Rule 1.8 for business transactions with clients?

Under Rule 1.8, which addresses business transactions with clients, the requirement of full disclosure and obtaining the client's consent is critical. This rule is designed to protect clients from potential conflicts of interest and ensure that they are fully informed about the terms of the transaction, the risks involved, and how the transaction may affect their interests.

Requiring full disclosure means that the lawyer must provide all relevant information about the transaction and how it might impact the client’s legal rights or interests. Consent means the client must agree to the transaction after being fully informed, making sure that the client is aware of potential conflicts and has made an independent decision to proceed. This manner of transparency ensures that the client retains the ability to make informed decisions regarding their legal and business interests, thus fostering trust in the attorney-client relationship.

The other options do not align with the requirements and ethical standards set forth in Rule 1.8, which emphasizes the importance of client protection and informed consent in business dealings.