If a government of a country with a zero trade balance increases its budget deficit, this typically leads to an increase in interest rates due to higher demand for funds. Higher interest rates may attract foreign capital, leading to an appreciation of the currency.
However, an appreciated currency can make exports more expensive and imports cheaper, which may lead to a trade deficit.
Given these dynamics, the most appropriate answer would be:
c. appreciates and there is a trade deficit.
However, if considering the effect of tighter monetary policies that might follow expansive fiscal policies, inflationary pressures could lead to depreciation instead. We might re-evaluate based on context, but generally, the answer could lean toward a depreciation leading to a trade deficit scenario.
In conclusion:
Since this is typically a complex matter dependent on other factors, ensuring a nuanced understanding would be essential, and considering "real exchange rate" influences including inflation and interest rates is crucial in answering correctly. Based on conventional economic theory, however, a. depreciates and there is a trade deficit might actually be a correct interpretation given the implications of increased budget deficit on the price level and foreign capital.
Note: It's valuable to review contextual economic trends that could influence real-world scenarios.