Purchasing Power Drives the Choice Steps:

• Evaluate after-tax income as the net earnings available for spending.
• Factor in cost of living to calculate real purchasing power (after-tax income adjusted for expenses).
• Identify the scenario where Germany's after-tax income exceeds England's while costs are lower, maximizing disposable income.
• Select the option showing this net financial advantage despite lower pre-tax pay.

Why D is correct:

• Higher after-tax income and lower cost of living boost purchasing power, defined as after-tax income divided by cost-of-living index, yielding more real wealth.

Why the others are wrong:

• A: Higher incomes offset by higher costs leave purchasing power unclear or neutral.
• B: Matches D's benefits but lacks the decisive edge in the comparison.
• C: Lower after-tax income and even lower costs likely reduce overall purchasing power.

Final answer: D