Final answer:
The careers that should be started before the age of 31 are electrician, carpenter, and construction manager.
Step-by-step explanation:
The careers that should be started before the age of 31 if you want to enter that particular field are B) electrician, C) carpenter, and D) construction manager. These careers typically require a combination of practical training, apprenticeship, certification, and experience.
For example, becoming an electrician generally involves completing an apprenticeship program, which can take several years, and obtaining a license. Starting at a younger age allows individuals to gain valuable experience and skill development earlier in their careers.
Similarly, becoming a carpenter or a construction manager often requires a combination of on-the-job training and formal education. Starting at a younger age gives individuals more time to acquire the necessary skills and experience.
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