What method can be used to determine the speed of a vehicle that encounters side slip in a curve?

Answer: B — Yaw marks

Yaw marks are the correct choice for determining the speed of a vehicle that encounters side slip in a curve because they are specific indicators of a vehicle's lateral movement during an unintended slide. When a vehicle begins to slide sideways due to loss of traction—often referred to as yawing—these marks can be observed on the road surface where the rear tires are displaced in the direction opposite to the turn. Analyzing the length and curvature of yaw marks can provide critical information about the speed at which the vehicle was traveling before the slide occurred. The unique characteristics of these marks, such as their angle and the distance between the marks, can be calculated using physics formulas to estimate the velocity and other dynamics of the vehicle during the incident. This contrasts with skid marks, which primarily indicate the vehicle's straight-line braking and may not always be present in a yawing scenario, brake marks that indicate where a vehicle applied brakes, and crash analysis, which focuses on the aftermath of an accident rather than the dynamics leading to loss of control.