Final answer:
Under VFR, the minimum flight visibility required to fly in Class B, C, or D airspace is three statute miles.
Step-by-step explanation:
Under Visual Flight Rules (VFR), the minimum flight visibility required to fly in Class B airspace is three statute miles. In Class C airspace, the minimum flight visibility required is three statute miles during day operations, or one statute mile during night operations. In Class D airspace, the minimum flight visibility required is three statute miles.