Final answer:
In 'Of Mice and Men', Lennie accidentally kills his puppy and is worried about George's reaction because of his past experiences with accidents due to his strength.
Step-by-step explanation:
The incident is referred to in the question describes a key event involving Lennie, a character from John Steinbeck's novel 'Of Mice and Men'. The correct answer to the question is c) Lennie accidentally killed, his puppy, and he's worried because he fears George's anger. Lennie is known for not knowing his strength and, in an unfortunate accident, causes the death of his puppy. As Lennie has a history of accidental harm due to his strength, he becomes extremely worried about how George, his caretaker and friend, will react. George has always been the one to smooth over Lennie’s mistakes, and Lennie fears that he may have pushed his limits too far this time.