Which document indicates that a passport holder is authorized to enter a specific country?

The Schengen Visa is the correct answer because it is specifically designed to grant passport holders the right to enter, stay, and travel within the Schengen Area, which consists of 27 European countries. This visa allows for border-free travel among these countries, thereby facilitating easier access for tourists, business travelers, and other visitors. The Schengen Visa indicates that the holder has met the entry requirements set forth by the member states, which may include having sufficient financial means, travel insurance, and the purpose of travel, among other criteria.

In contrast, while the Visa Waiver Program allows citizens from certain countries to travel to the United States for tourism or business for a period of up to 90 days without obtaining a visa, it does not apply to other destinations. An Identification Card is typically issued for domestic purposes and does not inherently grant international travel rights. Similarly, a Travel Certificate may refer to various documents but does not serve as a formal visa, which is essential for entering a country. Hence, the Schengen Visa is the document indicating explicit authorization for entry into those specific European countries.