look at the gap in argument so that you can anticipate the answer choice beforehand -
Premise
A sudden increase in exercise regimen --> increased risk of heart attack.the author's conclusion -
New health program in the company --> increased risk of heart attack.Note that the left hand sides of both these are not the same. For my conclusion to logically follow, I must connect the premise to conclusion.
i.e. any answer option that says this is the correct answer -
New health program in the company --> A sudden increase in exercise regimenWhich option says this? Option A.
Option B - Incorrect.
Negate this.
"the exercise involved in the new health program are as strenuous as or less strenuous than those in the previous health program." - this does not weaken the argument. The previous program might have been held some time back and thus employees haven't been exercising for a while.
This then means that they will experience an abrupt increase in exercise regimen.
Option C - Incorrect.
Not necessary. Even if it increases the exercise regimen of some of them, it increases the risk of heart attacks.
Moreover, this option does not talk about "increase in exercise regimen". It talks about something else "exercising regularly".
Option D - Incorrect.
Not relevant.
Option E - Incorrect.
Even if they participate, we do not whether this will constitute an increase in their exercise regimen or not. Hence, incorrect.