Under high pressure and intense heat, graphite, the most stable form of pure carbon, changes into the substance commonly referred to as diamond and remaining this way whether or not the heat and pressure are removed.
Under high pressure and intense heat, graphite, the most stable form of pure carbon, changes into the substance commonly referred to as diamond and remaining this way whether or not the heat and pressure are removed.
因为Thus is the most economical way to say: this way,like that, as such, or in this way.
D: In this way is unnecessarily wordy; although indicate that the heat and pressure are always or definitely removed,but this makes little sense in relation to the rest sentence.