What are the foundational requirements for expert testimony according to Rule 702?

The correct choice outlines the foundational requirements for expert testimony as established in Rule 702. According to this rule, expert testimony must be based on sufficient facts or data. This means the expert's opinion should have a solid grounding in observable phenomena, empirical data, or existing knowledge that lends credibility to their conclusions.

Additionally, the use of reliable methods is crucial. This refers to the techniques and processes the expert employs to arrive at their opinion, ensuring that they follow established procedures recognized in their field. Finally, the consistent application of these methods implies that the expert must apply their reliable techniques systematically and uniformly to the facts of the case at hand. This comprehensive framework ensures that expert opinions are not only helpful but also admissible in court, as they contribute valuable insights that aid the trier of fact.

By fulfilling these requirements, the testimony can clearly assist the jury or judge, and it is corroborated by sound methodology and relevant data.