<span>D: Modern art, hope this helps</span>
Answer:
hey! email me at ellahomeworkhelp at g mail dot com. you didn't include the passage, so you should send it to me there and i'll help you with your question.
Explanation:
The dog, Duke, would either stand still as a post while Hooper was on the ground, to urge him to get up and continue trying. Or he would do something completely different - he would walk faster and faster, which in turn made Hooper walk faster than he used to, which eventually affected his endurance and stability positively.