The Finance Minister argues:
The World Bank's Doing Business ranking measures how difficult it is for a hypothetical business to comply with regulations and pay taxes.
The government has made tax filing easier for small and midsized businesses.
Therefore, the country's Doing Business ranking will probably improve.
The key assumption is that the businesses whose tax filing was simplified are actually relevant to the hypothetical business used by the World Bank.
Why (D) is correct
(D) Is what the finance minister considers to be a midsized business smaller than the hypothetical business used to produce the "Doing Business" report?
This directly tests whether the tax simplification applies to the hypothetical business used in calculating the ranking.
Suppose:
The government's "midsized business" = 50 employees
The World Bank's hypothetical business = 500 employees
Then simplifying taxes for businesses with 50 employees might have no effect at all on the hypothetical business's tax burden.
So the ranking might not improve.
But if the hypothetical business falls within the government's definition of small/midsized, then the simplification could affect the ranking, strengthening the Finance Minister's argument.
That's exactly what an Evaluate the Argument question wants: information that could make the argument either stronger or weaker.
Why the others are wrong
(A) Whether easier regulations lead to more new businesses is irrelevant.
The argument is about how the World Bank calculates the ranking, not whether more businesses are created.
(B) Whether businesses are actually complying with tax laws more is irrelevant.
The report measures difficulty of compliance, not the actual compliance rate.
(C) This tells us whether tax preparation is more difficult than other regulations. But even if taxes are the hardest part, we still need to know whether the hypothetical business is affected by the simplification.(E) Whether the Finance Minister was in office when the previous report came out has no bearing on whether the ranking will change.
Correct option D