Final Answer:
The sentence that best expresses the main idea of the passage is 1. "Thomas A. Edison Middle School has removed all vending and soda machines from its campus." Thus, the correct option is 1.
Step-by-step explanation:
The primary focus of the passage centers around the action taken by Thomas A. Edison Middle School to remove vending and soda machines from its campus. This decision is a significant and concrete step in addressing a broader issue, likely related to student health and well-being. By highlighting this specific action, the passage implies a deliberate effort by the school to make a positive change regarding the availability of certain food and beverage options.
While options (2), (3), and (4) touch on relevant themes such as mixed feelings about banning soft drinks, the potential challenges of positive actions, and concerns about student obesity, they do not directly convey the central action taken by Thomas A. Edison Middle School. The removal of vending and soda machines is a concrete decision that aligns with broader discussions around health in schools, making it the most fitting choice as the main idea.
In conclusion, the selection of option 1. effectively encapsulates the essence of the passage, emphasizing a tangible step taken by a specific school to address a larger issue. This choice aligns with the principle of selecting the option that most directly and comprehensively communicates the core message of the passage. Thus, the correct option is 1.