Answer:
C. Whoever is named in her durable power of attorney
Explanation:
A Durable Power of Attorney can be used to allow another person to sign contracts, pay bills and take care of the banking on behalf of Ingrid. The Durable Power of Attorney remains effective even in circumstances when Ingrid becomes incapacitated. However, Ingrid needs to be mentally competent by the time of signing the Durable Power of Attorney.