Mostly, the Europeans dominated because their numbers or military technology and organization were superior.
Considering the alternatives, the only alternative that represents any sort of military power being evolved with it is:
d. They built infrastructure to keep military units traveling and intimidating the locals.
Also, the British and other countries did build many railroads in Africa.
B would be the awnser because it is the only true statement here
Answer:
Food and security.
Explanation:
The presidios faced many challenges such as food and security of its people and struggle to maintain their control from the natives people and save themselves from native people that lives around them because the Spanish comes and captured their lands. Spanish soldier defend the newly captured territories and take on such a difficult job for their country's welfare, prosperity and for expanding influence of their country.