B...............................................
Answer:
Citizens are allowed to vote at 18 years old in the United States ( second choice)
It's kinda hard to explain but I found a reliable website
http://www.history.com/topics/mcculloch-v-maryland
Answer:
150 years ago, the construction of the First Transcontinental Railway was completed in the United States. The implementation of the project has become one of the most ambitious scientific and technological achievements of the United States in the 19th century and has led to a revival of the national economy. However, the construction was mainly carried out in territories captured from the Indians. According to historians, the highway has greatly accelerated the process of extermination and enslavement of the indigenous people of North America, and also contributed to the destruction of natural diversity on the continent.
Explanation:
