Generally, the relations between Native Americans and Spain were different from relations between the Native Americans and France in that the Spanish were far more cruel to the Natives than the French were, who wanted to work with them as much as possible.
If by planters you mean "Plantation owners", then it is planters. Plantation owners were at the top of the South's social hierarchy because they possessed large plots of land, yielding much income from the that land, and with the income came political power.
It should be the third choice
Nations responded to threats to their allies by mobilizing their militaries.
By the time that anyone took back the decision to go to war, it was already too late because militaries got ready so quickly. It was like lighting a fuse, it happens so fast, it is almost impossible to stop.