Concept:The jumbled parts must be rearranged to form a grammatically correct and logical sentence starting with "Scientists point out".
Explanation:The opening phrase "Scientists point out" needs a dependent clause to follow it.
Part Q ("that it is an aftermath that") is the correct connector after the opening.
Part R ("has now reached its peak") completes the idea started by Q.
Part P ("of sunspot activity") tells what the cycle is about.
Part S ("of the eleven-year cycle") gives the duration of the cycle.
Thus the correct order is Q, then R, then P, then S.
This forms the sentence: "Scientists point out that it is an aftermath that has now reached its peak of sunspot activity of the eleven-year cycle."
Answer:Option C: Q R P S