Actors generally learn their lines by focusing on the meanings of the words, the motivations of the characters uttering them, and the physical and emotional dimensions of their own performances.
Conclusion (so)
The approach of considering the meaning, motivation, and physical/emotional components of words is probably more effective than rote memorization at enhancing memory.
Intermediate Conclusion (seems likely that)
The argument outlines that engaging with the emotional context, motivation of characters, and physical aspects of delivery may enhance memory.
Evidence
Actors use emotional, action, and context to learn their lines.
Evaluate
The fact that actors use a certain technique to remember their lines isn't great evidence that "this is the superior way to remember things!"
First of all, maybe the job actors have in memorizing lines is atypical, relative to most things people try to memorize. For example, a geometry student needs to memorize the formula for area of a trapezoid, but they don't need to perform that formula out loud later. They just need to understand it enough to solve for the area of a trapezoid.
Would something like "area of a trapezoid" even be eligible for the author's method? Is there emotion / meaning / context / physical delivery? Doesn't seem like it.
If you're memorizing the capital of Nevada, it seems like rote memorization of "Carson City" is more realistic than thinking about the emotion / meaning / context of Carson City.
Since we need to strengthen, we would want to go against this sort of skepticism. We want rote memorization to sound bad, and we want the author's method to sound accessible / easy / effective / widely applicable.
Goal
We want to eliminate the four answer choices that strengthen the idea that the author's proposed method provides better memory retention than does rote memorization.