The line “Chair’d in the adamant of Time” from the poem "America" implies that America, and all it represents, is here to stay. Given this, what is most likely the meaning of adamant?

unbreakable hold

varying effect

positive change

menacing presence

What is the best way to manage oil transport on waterways? a. prevent oil spills and regulate the amount of oil that can be shipped at one time.b. use a skimmer, containment boom or chemical dispersant to clean up spilled oil.c. burn off oil spills from the water's surface when they occur.