Answer:
The third box, the fourth box, and the second box
Step-by-step explanation:
The first segment that describes Part A is the one that is increasing because based on the information, the airplane <em>climbs</em>, meaning it's going up.
The second segment that describes Part B is the one that is a straight horizontal line, and this is because the airplane is flying at a <em>constant</em> rate, so it will be straight.
The third segment that describes Part C is the one that is decreasing (going down) slowly. This is because the airplane is down <em>descending</em>, which is also means going down.
