Answer:
I believe the answer is D. art became the primary way to express one status and wealth
Benefits, as a result of the BNM method, include a significant reduction in ambient air pollution, thereby reducing environmental and health impacts. A decreased use of coal leads to considerable cost savings, fires last longer and are ready for cooking much sooner.
Metaphor? A cardinal sin is an intangible thing....
Tetravalent
We have already seen an example of how a covalent bond can form between two hydrogen atoms producing molecular (H2) as opposed to the atomic form of hydrogen. ... As in all its compounds and its elemental forms, carbon is tetravalent, which means that it always forms four bonds.
The answer would be Forms. Hope that helps.