Question

sagacious has the same or almost the same meaning as:
stealthy
vacant
hilarious
astute

Explanation:

"Sagacious" means having keen perception and good judgment. "Astute" also means having or showing an ability to accurately assess situations or people and turn that to one's advantage, so they are similar in meaning. "Stealthy" means secretive, "vacant" means empty - minded or unoccupied, and "hilarious" means very funny, none of which are similar to "sagacious".

Answer:

D. astute