I think the answer is <span>B. Consider the alternatives in their consequences. D also makes sense.
Hope this helps!
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Answer:
it is lacking when it needs to be accomplished
When it comes to losing weight it has to do more with your diet(what your eating). "70% on the kitchen and 30% in the gym"
crunches and planks don't burn a lot but you would get muscle in your core.
do things like cardio (running, swimming, biking) that burns a lot of calories