Can someone please help me to understand this , According to me this one is not correct ... Option D sounds better ....
Let me try :
Premise : Yoga --> (1) strength muscles + (2) increase flexibility
Authors Point : Because muscle strength is more important to most people, yoga teachers should choose to focus primarily on exercises that strengthen muscles.
Author assumes that Yoga teachers are either focusing primarily on flexibility enhancing exercises or focusing equally on muscle strengthening or flexibility exercise. It means author thinks that exercises on which teachers are focusing are not helping much to people demanding muscle strength. Author is assuming that muscle strengthening is not even by product of normal exercises thus he is asking teachers to focus specifically on other type of exercises. Yoga can help strength muscles and increase flexibility. Because muscle strength is more important to most people, yoga teachers should choose to focus primarily on exercises that strengthen muscles.
Which of the following is an assumption on which the argument depends?
C) Even if a practice has two benefits, teachers should focus on the one that the majority of people find important
Option C is clearly in line to what we paraphrased in pre-thinking step. If you negate this choice authors claim will fell apart.D) If an exercise is designed primarily to strengthen muscles, that exercise will not also increase flexibilty.
Option D is a trap. tangent to our assumption. exercise designed primarily to strengthen muscles will not also increase flexibility, so what ?
Even teachers are not favoring flexibility exercise or not even people demanding flexibility exercise.
Lets do negation test on this:Exercise designed primarily to strengthen muscles will also increase flexibility.
Does it destroy authors claim ? Though exercise has dual nature, it doesn't go in favor of any side or destroy authors claim. statement is balanced.
I would say option D is just reverse of authors assumption. If I say that a flexibility enhancing exercise does not help in making muscle then it clearly favors authors claim and that is why author is asking teachers to focus on specific types of exercises because current types are not benefiting people.
Negation is a powerful tool; if in case you are in doubt between two choices use it.
I hope you got the point.
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