Respuesta :
Canning was unsustainable because the process back then was labor intensive; the process was still undefined, and the materials are very primitive. The cans used were corked and sealed with lead which led it to be hazardous
Answer:
A. Overfishing began to drain resources.
Explanation:
Those challenges included fishermen catching more fish than the canneries could process which means a lot of it went to waste. And some areas were actually overfished and resources began to run out, which meant this was an unsustainable system.