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Class B airspace generally surrounds the busiest airports in the US (e.g., Atlanta, JFK, LAX). To enter Class B, a VFR pilot needs

Choices

no clearance — just fly in.
Entering without clearance = airspace violation.
✓ EXPLICIT ATC clearance ("cleared into the Class Bravo").correct
Entering Class B requires an explicit ATC clearance — the controller must say "cleared into the Class Bravo"; "standby" or "remain clear" is not a clearance. A Mode C transponder and ADS-B Out are required within the Mode C veil, which extends from the surface up to 10,000 feet MSL within 30 NM of the Class B primary airport (14 CFR 91.215(b)(2) and 91.225) — not at all altitudes. Aircraft not originally certificated with an engine-driven electrical system are excepted under 91.215(b)(3). Two-way radio communication must also be established, and the pilot must hold at least a Private Pilot certificate, or be a student, sport or recreational pilot with the 61.95 endorsement — except at the Class B airports listed in 14 CFR Part 91 Appendix D, Section 4, where solo student operations are prohibited outright.
only a CTAF announcement.
CTAF doesn't apply to Class B.
a CFI must be on board.
CFI not required, but training endorsement may be.

Why

Entering Class B requires an explicit ATC clearance — the controller must say "cleared into the Class Bravo"; "standby" or "remain clear" is not a clearance. A Mode C transponder and ADS-B Out are required within the Mode C veil, which extends from the surface up to 10,000 feet MSL within 30 NM of the Class B primary airport (14 CFR 91.215(b)(2) and 91.225) — not at all altitudes. Aircraft not originally certificated with an engine-driven electrical system are excepted under 91.215(b)(3). Two-way radio communication must also be established, and the pilot must hold at least a Private Pilot certificate, or be a student, sport or recreational pilot with the 61.95 endorsement — except at the Class B airports listed in 14 CFR Part 91 Appendix D, Section 4, where solo student operations are prohibited outright.

FAA source: 14 CFR §91.131(a), operations in Class B airspace; AIM 3-2-3browse the reference library →

Covered in Supplemental · I — Preflight Preparation — study the lessons free, then practice with grading and mastery tracking.

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Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question. Reviewed by a panel of three CFIs + AI review.