Final answer:
The method mystery() instructs an object to perform three left turns, each presumably 90 degrees, which cumulatively result in the object turning right by 90 degrees.
Step-by-step explanation:
The method described in the question is a simple control method often found in programming exercises related to robotics or simulations.
The mystery() method executes the turnLeft() command three times consecutively. Since one turnLeft() usually signifies a 90-degree turn to the left, performing this action three times would result in a 270-degree turn.
This effectively is the same as turning right by 90 degrees or one quarter-turn clockwise without actually including a turnRight() command. Thus, the correct answer to what this method does is: A) Turns Right.