In Mexican politics, a difference between Porfirio Díaz and Lázaro Cárdenas was that

a. Díaz did more to redistribute land.
b. Cárdenas did more to redistribute land.
c. There were more strikes and labor protests under Díaz.
d. Díaz established PRI as a political party.
e. Díaz discouraged investments from foreign countries.

The right choice IS:

b. Cárdenas did more to redistribute land.

President Lázaro Cárdenas applied a land reform that wanted to achieve some changes in the property structure of the land in Mexico, eliminate "parasitic" landlordism and lay the basis for a just redistribution of land among peasants and for agroindustry. Porfirio Díaz was a 19th century leader , a man of the old social system.

Explanation:

(e) a major consequence of the election was that several southern states

the name of the theory is landmass theory.