Answer: I cut my finger with a stick that I found in the pond.
Explanation: This sentence is best because every other sentence is grammatically incorrect. In the first sentence you would be adding an extra sentence, when you can make it one. In the third sentence you put a period in the middle of a perfect sentence, only to make another one. In the fourth sentence you are implying that the pond cut you rather then then stick. And lastly in the fifth sentence, the fifth sentence just isn't proper English.
Cassie and Lillian Jean went to the Forrest where she slapped Lillian books to the floor. Lillian Jean then slapped her and Cassie took it as her opportunity to fight back and make Lillian apologize ffor her rude behavior.
