Under what conditions would the pre-treatment capabilities of a reverse-osmosis freshwater generator MOST likely be overloaded, and as a result, these conditions should generally be avoided?

Correct Answer: Option B — Entering harbors.

Harbor waters contain high concentrations of silt, organic matter, and pollutants. These contaminants rapidly overload pre-treatment filters and foul reverse osmosis membranes. Operating in such environments should be avoided or minimized, and systems are often equipped with automatic shutdowns to prevent damage from poor-quality intake water.