High rates of depression among nursing-home residents may result at least in part from a
Why this is right
Such lovable, soft wording! "X may result at least in part from Y". This is just saying, "It's possible that lack of companionship plays at least some nonzero role in the high rates of depression among nursing-home residents". That is suggested by the fact that residents who form personal bonds (i.e. companionship) with pets have way lower rates of depression. Some of us may be thinking 1. how do we know that the correlation between bonds-with-pets and depression indicates that the bond caused the lessening of depression? (Reverse Causality -- Maybe you have to be not-depressed in order to even be able to bond with pets / Third Factor -- Maybe pet bonding and lower rates of depression are both symptoms of being a well-adjusted person who lived a good life) 2. Even if it is the case that having a pet causes a nursing home resident to have less depression, how do we know that the causal mechanism there is alleviating a lack of companionship? These are both valid questions. We don't know for sure the answers to those questions. But since this is Most Supported, we're not demanding an answer that is perfectly provable. We're on the sliding scale of Best Available answer, and it's hard to make the case that any of these other answers would be easier to defend in court.
Skill tested: Most Supported · how this choice captures the argument's function is the move to repeat next time.