please help

which of these is an example of Mutualism? A- Cattle egret eats the exposed insects as the cattle graze B- Honeybee pollinates a flower while gathering nectar C- Tick gains nourishment by sucking blood from a dog D-Two bucks fight to gain territory and to gain a mate

mutualism is : One organism lives in, on, or near another, and both gain something they need for survival. Both organisms are helped; none are harmed. Example: A hummingbird drinks flower nectar while pollinating other flowers.