Final answer:
The workers react to John's calling the D.H.C. 'My father' with shock and offense, as the concept of parenthood is alien to them. John's behavior challenges societal norms and causes curiosity among the workers.
Step-by-step explanation:
When John refers to the D.H.C. as 'My father,' the workers react with shock and offense. This is because the concept of parenthood is alien to them, as they are part of a society that has eradicated traditional family relationships. In their world, reproduction is carried out through scientific means and there is no understanding or recognition of familial bonds. John's behavior challenges their societal norms and causes confusion and curiosity among the workers.