Which of these did not contribute to a weakened economy in the Roman Republic? A the spread of agricultural slavery B increased unemployment among small farmers C devaluation of Roman currency D discovery of new gold and silver deposits in northern Italy

the spread of agricultural slavery

Explanation:

The spread of agricultural slavery actually did not create to a weakened economy because the slaves gave money to the owners. The answer to the question is the spread of agricultural slavery. Hope this helps!

i believe your answer is d)

c) troops march forward in close formation against newer, more accurate weapons