Step 1: Understand the impact of fiscal policy and capital inflows in a small open economy.
In a small open economy with floating exchange rates, fiscal expansion and capital flows have significant effects on income, exchange rates, and net exports.
Step 2: Analyze the options.
- Option (A) is incorrect. In a small open economy with a floating exchange rate, fiscal expansion does not always raise income in the long run. It may raise domestic income in the short run, but it can lead to higher interest rates and currency appreciation, which could offset the expansionary effect.
- Option (B) is correct. Fiscal expansion can have no long-term effect on income due to crowding out and the appreciation of the exchange rate.
- Option (C) is correct. Capital inflows lead to an appreciation of the domestic currency, which makes exports more expensive and thus reduces net exports.
- Option (D) is incorrect. Capital inflows typically appreciate the currency, making exports more expensive and leading to a decrease in net exports.
Final Answer:
\[
\boxed{\text{(B) and (C) are correct in the case of a small open economy with floating exchange rate.}}
\]