The Balance of Payments (BoP) is a systematic record of all economic transactions between the residents of a country and the rest of the world during a specific period, usually a year. These transactions include the export and import of goods (visible trade), services (invisible trade), and financial assets (capital transfers). According to NCERT Class 12 Macroeconomics, "residents" include individuals, business firms, and government agencies. Option A is the correct choice as it provides the most comprehensive definition of the BoP's scope. Other options are incorrect because they either focus on a single component (Option B for goods, Option D for capital) or incorrectly limit the participants to only governments (Option C).