A guyot is . A. any portion of the ocean floor that is topographically higher than surrounding sea floor B. an extinct oceanic hot-spot volcano that has not yet subsided below sea level C. an extinct oceanic hot-spot volcano that has subsided below sea level D. so named because in cross-section it resembles Guyot Hall, the geology department at Princeton

c.an extinct oceanic hot-spot volcano that has subsided below sea level

Explanation:

- Marine geology defines a guyot as an isolated underwater volcanic mountain with a flat top more than 200m below the surface of the sea.

-The flat top is due to years of wave erosion.

-Guyots can form a chain of seamounts as the ocean plate of the Earth's crust moves slowly over a hot spot that remains stationary beneath the plate.

i think the answer is a, hope this : )