The correct answer is A, along the coast of the Gulf of Mexico.
Although the Olmec culture had a diffusion that reached most of Mesoamerica, one of the regions where the clearest evidences of the presence of this culture have been found is the southern part of the Coastal Plain of the Gulf of Mexico, included between the Papaloapan and Grijalva rivers, which corresponds to the northern half of the Isthmus of Tehuantepec. Currently, this zone corresponds to the southeast of the state of Veracruz and the west of Tabasco. It is an area of a warm and very humid climate, weather conditions that probably also possessed in the pre-Columbian antiquity in that place.
During this conflict there were many instances of war crimes as they are defined by us now, committed by American forces against the Filipinos. american forces used some of the same tactics that the Spanish used in Cuba. These same tactical moves were commom during this era in history and used by most armies when confronted by guerilla forces.