Rewrite this sentence to use an appropriate pronoun: "The student asked Mary to help them."
The student asked Mary to help them.
The student asked her to help them.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite this sentence to use an appropriate pronoun: "The student asked Mary to help them."

### Input:
The student asked Mary to help them.

### Output:
The student asked her to help them.