How many signatures are required on the Statement of Support for candidates under the age of 18?

The correct answer reflects the requirement that a total of four signatures are needed on the Statement of Support for candidates under the age of 18. This process is designed to ensure that there is a robust level of support and commitment from various stakeholders in the candidate's life. Typically, the signatures required often include those from a parent or guardian, a teacher, and other supportive figures such as a counselor or mentor. This level of endorsement helps confirm that the young candidate has the necessary backing to engage in programs that may involve significant responsibility or commitment.

In the context of the other options, fewer signatures would not express the same level of support as mandated, which is why the answer calls for four to capture various forms of encouragement and oversight for the minor candidate.