Select the best paraphrase of the following sentence from the passage.

with their main source of income gone, the irish had to live in poor conditions, where diseases spread unchecked.
one disease that was common during the great irish famine was typhus. typhus is a bacterial infection that is usually spread by lice or fleas (murray 4).
the irish lost their main source of income and had to live in poor conditions, where diseases spread unchecked (murray 4).
with their main source of income gone, peasants had to live in poor conditions, where diseases spread wildly (murray 4).
with no potatoes, rural farmers and their families lost much of their earnings. they were forced into poverty, and diseases became far more common (murray 4).