To have the land for white settlers.
Napoleon lost much of his army, diminishing his ability to defend France.
While Napoleon was able to raise another army in a short period of time, they were not as highly (or well) trained then his Grande Armee, resulting in his defeat and seclusion from his Empire.
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Its c. Suppression of opposition
The mayon religion was based upon a pantheon of nature gods, how ever that's not a selection on your multiple choices. Me inferring, using the information I have would be <span>"B"... the cylcles of seasons and the movements of planets. :)</span>