What is the expected reaction of those with whom you disagree? What approaches can you take, or what argumentation levers can you use, to influence those with whom you disagree?

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume