The option that is NOT an excellent way to prevent e-waste from entering local landfills is:
C. Disassemble it. Disassemble the equipment and dispose of the parts in the local landfill.
Disassembling and then disposing of e-waste parts in a landfill is harmful as it can release toxic materials into the environment. The other options (recycling, taking it back to companies, and donating) are all environmentally responsible practices for managing e-waste.