A project manager pastes a messy export of 300 task names, owners and dates and asks Claude to "tidy this up." The result reorders the rows and changes some date formats, but not in the way she needs. Select the TWO changes to her prompt that would most improve the result.

Answer: A and B — Describe the target output: named columns, one date format, rows sorted by owner then due date. / State the cleanup rules, such as how to handle missing owners and duplicate tasks.

"Tidy this up" leaves both the target format and the rules for edge cases to guess. Option (a) defines the output format and (b) defines how to handle the awkward cases, which together tell Claude exactly what done looks like. (c) adds emphasis without information. (d) explicitly hands over the decisions that caused the mismatch in the first place.