[Solved] In which situation would expert witness testimony be most influential? A) a pretrial hearing involving competency to stand trial B) a jury trial involving child custody C) a jury trial involving the effects of pornography on adolescents D) a bench trial involving credibility of an eyewitness External Costs: Costs of a transaction or activity that affect people other than those directly involved in the transaction, not accounted for in the market price. Competitive Market: A market structure characterized by a large number of firms competing against each other, leading to efficient prices and products. Resources: Assets, materials, and inputs needed to produce goods and services. Overallocated: A situation where resources are disproportionately distributed or excessively committed to a particular project or area, potentially leading to inefficiencies.