Information that you would not need to calculate the balance of payments for the Eastern European country is its corporate tax rates.
This refers to the difference between cashflow leaving the country and those being brought into the country.
You would therefore need information on imports and exports, expenditures in other nations, foreign aid coming into the country, and tourist spending.
The country's tax rates however, have nothing to do with balance of payments.
In conclusion, option E is correct.
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