WHAT IS A IN THE QUESTION
He discovered the use of citrus fruit as a cure for scurvy
The best answer is A) <span>Creole elites didn't share political power with all citizens
After countries began winning independence, mainly from Spain, in the 1800s, the power structure among ethnic groups, which had been established by the colonial powers, did suddenly become equal. Elites, usually who were more ethnically European (creole in this context means mixed race) held an enormous portion of the wealth, which is a recipe for instability. </span>
NASA HQ are in Houston, Texas. Famous quote "Houston we have a problem" from Apollo 13 relates to it.