Amongst the options given, the possible answer would be "that Sayuri's intelligence is way beyond her years". A critical person can arrive at this answer because the situation stated that Sayuri had habits that differ from other children. Those extraordinary habits can be connected to the child's intellectual level. Kids that are more intelligent than the others will tend to display habits that are out of the ordinary.
Since there are no options listed to choose from, my best guess would be watches, since a lot of apple watch products are now sold with built in heart monitors.
I think that last answer is correct. The first two are definitely wrong in my opinion, and the third one seems incorrect because exercising and watching what you eat are things you should be doing outside of dieting.
I would say the handful of nuts but not 100% sure :)
<span>What are dietary supplements?
</span><span>vitamin A, B, ((B1, B2, B3, B5, B6 and B9) B12, C, D, E, K, Magnesium + Zinc, Glutamine, spirulina, omega 3 ...</span>