With which era of American history is this image MOST closely associated?

the answer is a) the proclamation of 1763.

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.

four sitting presidents have been assassinated while in office but the first was abraham lincoln,

probably that america is racist