Which of the following statements is/are true about the International Olympic Committee? A. It is based in Lausanne, Switzerland. B. It organises the modern Olympic Games and the Youth Olympic Games, held in summer and winter, every four years. C. The first Summer Olympics organised by the IOC were held in Athens, Greece in 1896.

All three statements are correct. The IOC is based in Lausanne, Switzerland (A). It organizes both Summer and Winter Olympics, and the Youth Olympic Games, on a four-year cycle (B). The first modern Summer Olympics organized by the IOC were indeed held in Athens in 1896 (C). The IOC was founded in 1894 by Pierre de Coubertin and has been the governing body for the Olympic Movement ever since.