What is the biggest problem with radioactive waste? O A. It cannot be recycled.
B. There is a large amount of it.
O C. It has a very long half-life.
O D. It generates a lot of heat.

Explanation:

It has a very long half-life.

D. It generates a lot of heat.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).