If Teresa's daughter is my daughter's mother, what am I to Teresa?
a. Grandmother
b. Mother
c. Daughter
d. Granddaughter
e. I am Teresa
If you are Teresa's daughter, then, duh, you are her daughter. So, C
Apologies for the confusion. You are correct.
c. Daughter
If you are Teresa's daughter, you are her daughter.
b. Mother
If Teresa's daughter is your daughter's mother, that means that Teresa's daughter is you. Therefore, you are Teresa's daughter, making you her mother.