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The answer is B, I am wondering is the C also correct?? The following reaction is...

The answer is B, I am wondering is the C also correct??

The following reaction is allowed to reach equilibrium is a glass bulb at a given temperature. 2 HgO(s) <---> 2 Hg(l) + O2(g) Delta H = 43.4 kcal/mol. The mass of HgO in the bulb could be increased by:

A)

removing some Hg

B)

reducing the volume of the bulb

C)

adding more Hg

D)

increasing the temperature

E)

removing some O
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