What form must an applicant fill out to determine if they are legally qualified to work?

The I-9 form is the correct choice because it is a requirement for employers to verify the identity and employment authorization of individuals hired for employment in the United States. This form confirms that the applicant is legally authorized to work in the country by collecting information and supporting documentation that proves their identity and work eligibility. It plays a critical role in ensuring compliance with immigration laws.

In contrast, the W-2 form is used for reporting wages paid to employees and the taxes withheld from them, while the 1099 form is typically used to report payments made to independent contractors and other non-employee income. The Employment Verification form, while relevant for confirming employment, does not serve the purpose of establishing legal qualifications for work in the same way the I-9 form does.