about 25-35% and you should be burning most of it
The answer to your answer is B because who cares what your freinds think,from a personal experience I shouldn't but I do,but still I shouldn't and neither should you or anyone else for that matter.
She could try Body Composition<span> Scales & Handheld Devices</span>
It's due to the increased production of Melanin that helps block UV light