Why was the Lewis & Clark Expedition important? A) It built the Transcontinental Railroad

B) It gave a better understanding of the Louisiana Territory

C) The United States gained parts of Mexico

D) Took land away from the British

I believe it's B) it gave a better understanding of louisiana territory

Explanation:

they sent a team to explore lands aquired in the louisiana territories

(not completely sure maybe do some more research based of my answer)

they were byzantines

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.