Sort the following features based on whether they correspond to active margins, passive margins, or both. Features:
a. formation of igneous rock
b. submarine lava eruptions
c. trench
d. gentle continental slope
e. accretionary prism
f. few or no earthquakes
g. mid-ocean ridge
h. continental rise
i. underlain by oceanic crust
j. formation of sedimentary rock
k. broad continental shelf
l. can be adjacent to thick continental crust