Because the economy of Texas depended on the sale of cash crops and other agricultural crops before 1860, all of the
following occurred EXCEPT:
a. Slavery increased in Texas.
b. Texas passed laws keeping African Americans under the ownership of wealthy owners.
C. Manufacturing factories flourished.
d. Fewer slaves were able to gain their freedom than in the past.

The correct answer is letter C

At the time of the Secession war, Texas, a slave, was found in the southeastern camp. Serving as a rear base, it suffered less than the other southern states. The decades that followed were marked by strong growth. In 1880, the beaten West Indians were displaced. The railroad progressively quadrille the state and livestock begins to become a source of wealth in a Texan economy dominated by cotton culture. The population quintupled between 1860 and 1900. Change accelerated after 1900. Texas became one of the most industrialized states in the Union, thanks to oil, discovered for the first time by Spindletop in 1901. World War II caused the emergency aeronautics and electronics sectors. Alongside industrialization, important metropolises appeared.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.