In a low-pressure steam system serving preheat or humidification, a primary role of a steam trap at the end of a coil is to (conceptual)?

Choices

• (A) Stop condensate from ever forming
• (B) Pressurize return above boiler
• (C) Discharge condensate while holding steam and preventing steam loss, subject to type (F&T, float,…)
• (D) Measure DP across filter