How were mexican citizens’ lives affected by the leadership of antonio lopez de santa anna?
a citizens faced many changes in laws and policies.
b citizens began to have more influence in mexican politics.
c citizens had less protection from a weakened military.
d citizens were silenced under harsh dictatorial rule.

The correct option is : A Citizens faced many changes in laws and policies.

Antonio de Padua María Severino López de Santa Anna and Pérez de Lebrón (Xalapa, February 21, 1794-Mexico City, between June 20 and 21, 1876) was a Mexican politician and military officer. He was President of Mexico.

In the beginning, and thanks to the fact that it knew how to surround itself with good advisers, the government of Santa Anna was one of good results. However, after the death of Lucas Alamán, his main collaborator, the government of Santa Anna gradually degenerated into a dictatorial one. She called herself "Most Serene Highness" and restored the formerly extinct Order of Guadalupe. That aroused suspicion of the possibility that the dictatorship would be transformed into a monarchy.

During the dictatorship of Santa Anna, the Mexican government continued to face a precarious financial situation. That forced Santa Anna, in order to cleanse the already feeble national treasuries, to collect the most iniquitous taxes. From the doors and windows, to the possession of dogs. Similarly, in order to contain once and for all the expansionist desire of the United States, Santa Anna was forced to cede, in exchange for 10 million dollars, the Mexican territory of La Mesilla. By then, the popularity of the self-appointed "Defender of the Fatherland" was already in tatters. It would be already in the last part of his dictatorship, when Juan Álvarez, a southern cacique and former leader of the Independence, together with many other political opponents, would promulgate the Ayutla Plan.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -