A solid blue line on a sectional chart, with a similar pattern to Class B shelves but around a smaller airport, indicates:
Why →
Class C airspace on a sectional is depicted with solid magenta lines (not blue) in current charts, typically showing two concentric rings (inner core to 4,000 feet and outer shelf from 1,200 to 4,000 feet). Class D airspace is shown with a dashed blue line in a single boundary. The question's setup (solid blue, concentric) is closest to Class B in appearance. Test-takers must be precise about color and line style.The trap →
This question is a pattern trap; older training materials had inconsistent color use for Class C. The current FAA chart standard is solid magenta for Class C, dashed blue for Class D.SOURCE → FAA Aeronautical Chart User's GuideCHECKED APR 21ACS II.A.K1EASY