Step 1: Understanding the Concept:
Electronic waste (e-waste) contains hazardous materials like lead and mercury that can contaminate the environment if not handled properly.
Step 2: Detailed Explanation:
(A) Donating is good for reuse, but if the device is broken or old, it will eventually become waste.
(B) Selling also promotes reuse, but doesn't guarantee safe final disposal.
(C) Authorized e-waste recyclers use specialized processes to recover valuable materials and safely dispose of toxic components. This is the most professional and sustainable method.
(D) Burying electronics is dangerous as toxic chemicals can leak into the soil and groundwater.
Step 3: Final Answer:
Recycling through official e-waste channels (C) ensures the least environmental impact.