What must be true regarding elements in structural performance?

For elements in structural performance to be effective and safe, they must be straight and free of defects. This is crucial because structural elements must properly bear loads, provide stability, and resist various forces such as wind, seismic activity, and the weight of the materials above them. Any deviations, such as warping or defects, can significantly weaken a structure's integrity, leading to potential failure or safety hazards.

The straightness of elements ensures they fit properly within the overall framework and function as intended. Defects—such as cracks, splits, or deformations—can compromise strength and reliability, making it vital to maintain high standards for the condition of these components. Thus, this option correctly emphasizes the necessity for structural elements to be in prime condition to uphold safety and performance standards in building construction and design.