A) What connection can you make between the access to supplies and the size of armies?
B) What might have changed as farmland was destroyed in the South?

for A: you need more supplies for a bigger army and for B: if the are less farm land then less supplies and that is bad

Explanation:

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: