Step 1: Understanding the Question:
There are two main types of demonstrations in extension:
1. Method Demonstration: Focuses on HOW to do a task (Process).
2. Result Demonstration: Focuses on proving that the new way is BETTER (Outcome).
Step 2: Detailed Explanation:
• A & B: Method demo is used to teach a skill, like how to use a sprayer (Instrument) or how to preserve fruits (Skill). It is a \enquote{Step-by-step} teaching process.
• C: In a method demo, you just show the right way. You don't necessarily compare it with the old way right there.
• Exclusion (D & E): \enquote{Comparison} (D) and \enquote{End Results} (E) are the hallmarks of a Result Demonstration (e.g., growing two plots of crops to see which yield is higher).
Step 3: Final Answer:
Method demonstrations cover A, B, and C.
Thus, the correct answer is D.