Answer: Legal action is an effective way to discover information about the dangers of concussions
Step-by-step explanation:
The best inference that is supported by the sentence is that "Legal action is an effective way to discover information about the dangers of concussions''.
From the sentences given, it's stated that more than 2,000 retired NFL players filed a lawsuit against football helmet maker Riddell and the NFL because they hid information about dangers of concussions.