Posted: 2016-01-30 12:01:41
Answer: c. Daughter.
"Teresa's daughter is my daughter's mother"
my daughter's mother is actually me (i.e. the person who is asking the puzzle).
Therefore:
Teresa's daughter is me (i.e. the person who is asking the puzzle is Teresa's daughter).
Note: As there are only females available for the answer, the answer cannot be a male.