Final answer:
The true statement about tenants in common is that the ownership is passed down according to the deceased tenant's will or state law, and this type of arrangement can involve many individuals, not just married couples or family members.
Step-by-step explanation:
The statement that is true regarding a customer account held as tenants in common is that the ownership of the dependents is governed by their will or state law. Under tenants in common, the ownership interest of a deceased tenant does not automatically transfer to the surviving tenants but instead is passed down according to the deceased tenant's will or under the state's intestacy laws if no will exists. This arrangement can involve more than two individuals and is not restricted to married couples or family members.