Base your answer to question 30 on the poem below and on your knowledge of social studies
. . . . We’ll be back when it rains,
setting out with their bedsprings and mattresses,
their cookstoves and dishes,
tied to their running boards
setting out for California,
where even though they say they’ll come back,
if what they hear about that place is true. . . .
— Karen Hesse, Out of the Dust, April 1935
What was the main reason for the migration described in this poem?