The Clean Food Act and Meat Inspection Act were passed into laws because:ACars and tractors took the place of horses for transportationBFarmers were concerned about the health of their animalsCScientists realized that animal diseases were affecting peopleDVeterinary specialists wanted to focus on small animals

Sure, let's break down the question step by step:

1. Identify the Acts in Question: The Clean Food Act and Meat Inspection Act.

2. Understand the Purpose of the Acts: These acts were likely implemented to address issues related to food safety and the quality of meat products.

3. Analyze the Given Options:

   • Option A: "Cars and tractors took the place of horses for transportation" - This option seems unrelated to food safety or meat inspection.
   • Option B: "Farmers were concerned about the health of their animals" - This could be a reason, but it doesn't directly address the impact on human health.
   • Option C: "Scientists realized that animal diseases were affecting people" - This option directly links animal health to human health, which is a strong reason for implementing such laws.
   • Option D: "Veterinary specialists wanted to focus on small animals" - This option seems less relevant to the broader public health concerns that would necessitate such laws.

4. Determine the Most Relevant Option: Based on the analysis, the most relevant reason for the passage of the Clean Food Act and Meat Inspection Act is:

   • Option C: "Scientists realized that animal diseases were affecting people."

Therefore, the correct answer is C.