Why Did So Many Farmers Sink into Debt or Lose

Why did so many farmers sink into debt or lose their land in the latter years of the Roman republic?

A) The small-scale farmers who made up the bulk of the army were taken away from their land and livestock by military campaigns for so long that their farms failed.
B) As Roman political leaders increasingly depended on military conquest to maintain their power, they raised taxes on farmers in order to support the army.
C) The devastation of a prolonged drought and damage to the land from wars and foreign armies left farmers unable to grow crops.
D) Farmers hoped for easily gotten spoils while in military service and resisted returning to their farms.