The Declaration of Independence was a document mainly written by Thomas Jefferson. John Locke was an English philosopher that came up with the basis of a legitimate government, and this heavily influenced Jefferson while he was writing the Declaration.
The technology necessary for navigating such journeys had not yet been invented. Ships had to become better, then they needed maps and charts, compasses, and anything similar.
B.) Retaliation by foreign governments.
Southerners feared that tariffs would affect their fortunes given their reliance on exporting their agricultural produce. Retaliation by foreign governments would have meant that they would lose out as imposition of tariffs would reduce demand for their produce
"<span> D The extension of the Great Wall reduced contact between China and outsiders" is the best option from the list since this was the first wall of its kind to do this properly. </span>