Answer:
Weak because of proximate cause is difficult to prove in absence of other similarly affected individuals
Step-by-step explanation:
Since in the question it is mentioned that the 60 year old man have a lung cancer so he sues the asbestos manufacturer also he trust that it is unsafe as her friend who use the alternative material has not have a lung cancer so here the case would be weak as of proximate cause as it is difficult for proving it
Therefore the same is to be considered