PLEASE HELP ITS URGENT!!
which version best uses a variety of sentence structures to enhance the flow and writing style of a story?
A. Chico sat on the curb in front of the school, and because he felt nervous, he twirled a stick in his hand. aunt Marcy would be there soon, and since he knew she would ask about his trumpet, he knew he would have to explain everything.

B. Chico's sat on the curb in front of the school. He throw the stick in his hand. On Marcy would be there soon. He felt nervous. He knew she would have she would ask about his trumpet. He would have to explain everything.

C. as he sat on the curb in front of the school, Chico twirl the stick in his hand. Because Aunt Marcy would be there soon, he felt nervous. Since he knew she would ask about his trumpet, he knew he would have to explain everything.

D. as he sat on the curb in front of the school, tico twirled a stick in his hand . Aunt Marcia will be there soon. Chico felt nervous because he knew she would ask about his trumpet, and he would have to explain everything. ​