Which statements best describe oceanic crust? select the two correct answers.

a. its formed at zones of volcanic activity on the ocean floor.
b. it is made of all types of rocks.
c. it contains silicate minerals high in iron and magnesium.
d. it is between 25 and 70 km thick.
e. its age ranges from very young to more than 4 billion years old.

Options (A & C)

Explanation:

The statements that describes the oceanic crust are it contains high mineral contents like magnesium and iron, it is formed at volcanic zones on sea floor.

The reason behind is that it occurs due to the movement of continental plates over the sea area  diverge at mid ocean ridges where magna rises up . The lava thus  formed is  made from basalt igneous rocks which are rich in iron and magnesium contents

b) nuclear ive learned that in a pedtrodic table