Answer:
B. The gradual implementation of land distribution
Explanation:
Considering the options available in the question, the action that is not directly associated with the period of Mexican history between 1940 and 1968 is "The gradual implementation of land distribution."
However, during this period many things were associated with the period, including:
1. The continuation of a single party structure within the Mexican government: this is the period in which the ruling party "Partido Revolucionario Institucional (PRI)" continued to rule the country
2. Continued modernization within Mexico: this was the period of oil exploration and there is great industrial economic growth.
3. The removal of many of the socialist vestiges within the national government: during this period, many socialist vestiges were removed