One of the Reasons for the Growing Number of Poor

One of the reasons for the growing number of poor in Rome was the result of

A) Freed slaves without employment or citizenship rights.
B) The growing number of people without citizenship and without access to free public food.
C) New conquered lands that came under the control of the large landowners.
D) The growing number of landless peasants moving to the city to find employment.
E) Soldier's widows, without means of support, who moved to the capital.