yeah i think u r wrong. a geostationary satellite orbits at a height of 35800 odd kilometres, thats not its distance from the Earth's centre of gravity. so if you took 35800 and subtracted the other number then you would've gotten a height less than that of a geostationary orbit.
what i did...
Yes, the substrate is the reactant, not the product. but D is a product and C is the substrate. so im pretty sure the answer is C.
For this i put D for quarantine etc. but i dunno it could be C aswell...a weird one
I got C anyways. im pretty sure that its right.