Final answer:
A watch, umbrella, and wheelbarrow can aid in rescuing a cat from a tree by timing the rescue, providing a protective barrier, and transporting the cat.
Step-by-step explanation:
How could a watch, an umbrella, and a wheelbarrow help rescue a cat stuck in a tree? The most suitable option is D. You would time the rescue with the watch, use the umbrella to create a protective barrier, likely to catch the cat if it falls, and employ the wheelbarrow to transport the rescued cat back to safety. This solution emphasizes the practical use of each item during the rescue operation.