In general, which factor is not critical when playing sports?
a. following the rules
b. being a team player
c. expecting to win every time
d. staying positive

In experience, expecting to win every time is not critical when playing sports.

Staying positive, being a team player, and following the rules are more likely to make you expect to win every time, but in reality, even the best teams lose. It's quite rare to win every single time, and if so, you probably have the dream team or your opponent sucks.You should not think that you are going to win every time. A lose is bound to come no matter what. Cannot win every time, so don't think that way. Most people who are stuck-up and brag that they are going to win every game, tend to lose every game. The other options are enough to get you to win a few.

Not sure exactly what kind of answer you are looking for so i hope this able to be a effective listener and also being  a good conversationalist. and most of all just being there when someone needs you.i hope this .

It's called the nephron.