Answer:
d. Ruling out rival hypotheses
Explanation:
Ruling out rival hypotheses: this is a principles of scientific thinking which means evaluating a claim by using new methods or styles to correlates the previous hypothesis.
Dismantling in this concepts means:
"allows researchers to examine the effectiveness of isolated components of a broader treatment" means researchers are findings alternative methods or style to this hypothesis (a new research) and they will compare these effects with that of the full treatment package.
with this regards, researchers are evaluating the hypothesis effectiveness of isolated components of a broader treatment.
