Answer:
B. As she was running across the basketball court, the ball almost fell out of her hands.
Step-by-step explanation:
This sentence uses proper words and a comma. The comma connects both topics. It provides all of the information, such as the basketball court, and her.
A. Does not mention her, so it is confusing.
C. Is wordy and confusing.
D. Uses "running" twice and is confusing.
Hope this is correct. Have a great day.