Which of the following statements is FALSE?

a. Wildcatter Columbus M. "Dad" Joiner discovered the largest oil field in the world during that time in East Texas.

b. Texas grew to four times its size in population between 1920 and 1930 primarily because of the discoveries of oil in the state.

c."Farm to market" roads were eliminated with the construction of the interstate in Texas.

d. The taxation of oil revenues became very important to the state's budget.