Answer:
A) sue in court for a termination of the tenancy and partition of the property.
Step-by-step explanation:
Usually a joint tenant will sell his/her interest to a third party and that third party will become a new joint tenant himself/herself. But when for some strange reason the other joint tenants decide to try to mess up the life of the original joint tenant by opposing the sale, he/she can sue in court in order to end the joint tenancy and divide the property. Once the property is divided, the former joint tenants cannot interfere with the decisions made by others. Some courts will allow the current joint tenants the first right to purchase the piece as a way of keeping the property as one, but I don't know if all courts will do it.