What business problem does identifying dead code in the Discover phase primarily address?

Think of it like working hands-on with IBM mainframe systems — the answer here is 'Reducing the scope of code that must be analyzed, refactored, and transformed, saving time and cost'. Dead code identification reduces the modernization scope by excluding code that is never executed, directly lowering analysis, refactoring, and transformation effort and cost. On real mainframe exams, this concept comes up repeatedly so make sure you have it locked in.