Which lanes should stop for a school bus on a two-lane undivided highway?

• The lane in which the school bus is driving.
• The lane opposite which the school bus is driving.
• Both lanes must stop for a school bus.
  Explanation:

  "On a two-lane undivided highway, both lanes of traffic must stop when a school bus stops and displays its stop signal. This rule is in place to ensure the safety of children boarding or exiting the bus."
• No lane needs to stop.