Claude produces quarterly variance commentary by computing variances from a ledger export and then explaining them. The narrative is good, but some reported figures are wrong. What is the best change?

Answer: B — Compute variances in code, have Claude explain the computed table, and reconcile cited figures before publishing

Arithmetic is a deterministic sub-step that belongs in code; (b) assigns each piece to the right executor and adds deterministic reconciliation at recombination. (a), (c) and (d) keep the model doing exact calculation and only change how often it might be right.