Concept:This question tests the ability to rearrange jumbled sentence parts to form a logical and meaningful sequence.
Explanation:First, identify the introductory part.
Part Q begins with the noun 'researchers', making it the natural start.
Next, P follows logically because it tells what the researchers say.
Then, S should come before R because 'that like humans' describes the system, and then 'makes ethical judgments' completes the idea.
Thus the correct order is Q, P, S, R.
This corresponds to sequence QPSR, which is option A.
Forming the sentence: "Researchers say that they built an Artificial Intelligence system that like humans makes ethical judgments."
Answer:Option A (QPSR)