What is a primary feature of a revocable living trust?

A primary feature of a revocable living trust is that it allows the grantor to maintain control over the trust assets and make modifications as needed during their lifetime. This characteristic distinguishes revocable living trusts from irrevocable trusts, which cannot be changed once established. The flexibility to alter or revoke the trust provides the grantor with the ability to adapt to changes in circumstances, such as changes in family dynamics, financial situations, or personal wishes regarding the distribution of assets.

After the grantor's death, the trust typically becomes irrevocable, meaning that it cannot be altered anymore, aligning with option B. However, this feature is secondary to the trust's primary quality of being revocable during the grantor’s lifetime. Option C is incorrect because a revocable living trust can indeed hold real estate and other assets. Lastly, while certain legal formalities are required for creating a trust, the requirement for two witnesses is not specific to revocable living trusts and can vary based on state law, making option D misleading.