What criteria must be met in order to apply for a green card?
You must have a valid I-20 form and be on a STEM OPT extension.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What criteria must be met in order to apply for a green card?

### Input: Not applicable

### Response:
You must have a valid I-20 form and be on a STEM OPT extension.<|im_end|>