A qualifying individual must document experience. Who typically certifies the applicant's qualifying experience?

解析

Qualifying experience is certified on CSLB's Certification of Work Experience by a qualified and responsible person who personally observed the work — an employer, licensed contractor, supervisor, fellow journeyman, building inspector, architect, or union representative. (a) is the most attractive wrong answer because the form is signed under penalty of perjury, but the applicant's own declaration is not the certification; a third party's is. (b) confuses attesting a signature with vouching for the underlying facts. (c) reverses the burden: CSLB may audit or verify, but it does not supply the certification.