Question

reinforcing steel for walls, piers, columns and similar vertical structures must be
adequately supported to prevent overturning and collapse
angled to prevent cracking or warping
strong enough to support fifty times the weight of the structure
tethered to electrical utility poles with wires

Explanation:

Reinforcing steel in vertical structures like walls, piers, and columns needs to be adequately supported to prevent structural failure from overturning and collapse. Angling is not the main requirement for prevention of cracking/warping in this context. There is no standard of supporting fifty - times the weight, and tethering to electrical utility poles is dangerous and not a proper practice.

Answer:

A. Adequately supported to prevent overturning and collapse