※ 밑줄 친 부분에 가장 적절한 것을 고르시오. [문 1 ～ 문 2] Money is big business in Switzerland―a haven for foreign investments and private bank accounts. Switzerland's financial sector contributes more than 10 percent of the nation's GDP, and the Swiss franc is one of the most traded currencies in the world. What's the secret to the Swiss success? In a word: security. Investors covet the confidentiality of Swiss banks; they also rely on the stable economy and strong Swiss franc. Yet feeling secure is not just about economics. Confidence in the bank is also linked to confidence in the banknote. With the help of devices such as laser-perforated numbers and special color-changing ink, __________________________.