Critical Reasoning (CR) | Re: Many workers who handled substance T in factories became seriously ill

First time trying to answer a CR question by explaining. I hope this answer is right though lol.

Premise:
T causes illness. People who handle T get ill after many years. If T manufacturer investigates T impacts, illnesses are preventable.

Conclusion:
Despite of ignorance, T manufacturer is still guilty.

Task:
Justify the conclusion.

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Answer A - INCORRECT
Irrelevant. Arguments does not discuss compensation - just for the manufacturer to take responsibility, which may not be monetary

Answer
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