How is T related to K?
I. R's sister J has married T's brother L, who is the only son of his parents.
II. K is the only daughter of L and J.

Options

A. the data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question,
B. the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question,
C. the data either in statement I alone or in statement II alone are sufficient to answer the question,
D. the data in both statements I and II together are necessary to answer the question.

Explanation

To determine how T is related to K, we will analyze the information provided in both statements step by step.

### Step-by-Step Solution:

1. **Understanding the First Statement:**
- R's sister J has married T's brother L.
- L is described as the only son of his parents.
- From this, we can infer:
- J (female) is married to L (male).
- L is T's brother, which means T is a sibling of L.

2. **Understanding the Second Statement:**
- K is the only daughter of L and J.
- Since L and J are married, they are K's parents.
- This means K is the daughter of L (T's brother) and J (R's sister).

3. **Establishing Relationships:**
- Since T is the sibling of L and L is K's father, this makes T the aunt or uncle of K.
- Since L is male, T must be female to be K's aunt.

4. **Conclusion:**
- Therefore, T is K's aunt.

### Final Answer:
T is related to K as T's aunt.