Answer:
Let's check each statement:
1. Chile, El Salvador, and Mexico share similar uniform symbols. The reading does NOT say anything about the uniform symbols in El Salvador or Mexico. So the statement is FALSE. ❌
2. The same uniform colors were used in all schools in Chile. The reading states that "In Chile in the early 1930s, a unified school uniform was made mandatory for all educational institutions, public or private. The uniform consisted of a navy-blue sweater and a white blouse for girls. Boys were required to wear grey pants with a white dress shirt and a navy-blue blazer." So, the same uniform colors were used in all schools in Chile. Therefore, the statement is TRUE. ✔️
3. "It is the principals' decision to use uniforms in schools in Chile". The reading states that: "There are even a few private schools that have eliminated the use of uniforms". But it doesn't clearly states who's decision it is. So the statement is FALSE. ❌
4. El Salvador and Mexico Followed Chile's uniform policy. The reading does NOT say anything about Mexico and El Salvador following Chile's uniform policy. Therefore, the statement is FALSE ❌