What type of phrase is "a magnificent building"?

In twelve years a slave, solomon northup infers that which of the following characters ends up as a criminal? clemens ray burch john williams robert

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.

What is the main idea of this paragraph? asap