What marks the true division between continents and oceans? a. ...

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What marks the true division between continents and oceans?
  a. Abyssal plains
  b. Coastlines
  c. Coastal deep-sea trenches
  d. Granite-basalt transitions
  e. Alluvial fans

Question 2

What characteristic of continental crust accounts for more than half of Earth's solid surface being below sea level?
  a. Continental crust is denser than oceanic crust.
  b. Continental crust is thinner than oceanic crust.
  c. Continental crust is less dense than oceanic crust.
  d. Continental crust is both less dense and thinner than oceanic crust.
  e. Continental crust is the same density and thickness as oceanic crust.

[anoriega3]

Answer to Question 1

d

Answer to Question 2

c

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TYSM

[bdobbins]

Gracias!