6. XYZ Company was engaged in the construction of luxury multi-storey homes and midrise condominiums. One of its projects was a three-storey mansion of Senator A. XYZ Company was about to do concrete pouring of slab and beams on the second floor of the mansion, and this process would take at least 20 hours straight with no interruption or break; otherwise, the structural integrity of the second floor and beams would be compromised. More, the process would need 25 workers to finish. 2 B, one of the workers assigned to the project, refused to render overtime work, claiming that he cannot be compelled to do so. Is B correct? Reason(s).