Write a question about the following article.

I liked watching the watermelon smash against the fence and turn into a bunch of pieces . Compost ! My Mom says it 's what keeps their lawn going . We had BBQ chicken , baked beans , corn on the cob and fresh fruit salad for dessert . I also brought home made cookies . And that was my fourth !

Question:
Why did the watermelon smash against the fence ?
Available choices: a. Because they had BBQ chicken and baked beans .; b. Because someone threw it hard against the fence .; c. Because the writer brought homemade cookies .; d. Because they needed compost for the lawn .;