Final answer:
Dave should encourage supportive behavior among his conscientious laborers in the construction company, according to the House Path-Goal theory.
Step-by-step explanation:
Based on the House Path-Goal theory, Dave should encourage supportive behavior among his conscientious laborers in the construction company. According to the theory, employees are more satisfied and motivated when their leader provides the necessary support and clarification to help them achieve their goals. Supportive behavior can include offering guidance, removing obstacles, and recognizing and rewarding employees' efforts. By encouraging a supportive and empowering work environment, Dave can enhance the job satisfaction and performance of his conscientious laborers.