Answer:
A. This individual likely used his teeth to compensate for a missing arm and hand.
B. Others must have cared for this individual in order for him to survive.
Step-by-step explanation:
Due to the serious injuries sustained by The Shanidar 1 Neandertal which may have caused blindness, arthritic feet, and a missing right forearm. The most likely deduction is that he likely used his teeth to compensate for a missing arm and hand to cater for himself.
Another deduction is that other people must have cared for this individual in order for him to survive.