During which era did the "common man" make the most gains toward achieving the "american dream" of individual rights, equal protection under the law, and due process? a. the federalist era b. jacksonian democracy c. jeffersonian democracy d. the era of good feelings

b.jacksonian democracy

Explanation: The seventh president Andrew Jackson started a political philosophy in the19th-century that lasted from Jackson's election in the year of 1828  until slavery became the the most important topic by the year of 1854, during that time Jackson was known to oppose aristocracy and instead protect popular democracy and the individual liberties of the American citizens thus favoring the right environment for the American dream.

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.