1.A

2.A,C,D
3.C
4a.A
4b.C
There 100% correct

Based on the information you provided, it seems like you are listing a series of answers to different questions. However, there are some parts of your response that are unclear. Let me explain how to interpret your answers:

1. "A" - This answer corresponds to Question 1, but without the actual question, I am unable to understand its meaning or determine if it is correct or not.

2. "A, C, D" - These answers correspond to Question 2. Once again, without the actual question, I cannot verify if these answers are correct or not.

3. "C" - This answer corresponds to Question 3. Similarly, without the question, I cannot determine its correctness.

4a. "A" - This answer corresponds to a sub-question of Question 4. Without the full context or the original question, it is difficult to evaluate its accuracy.

4b. "C" - This answer is another sub-question of Question 4. Just like the previous answer, without more information, it is not possible to determine its correctness.

In order to determine if your answers are correct or not, I would need the original questions associated with each answer choice. Without them, I cannot provide a definite assessment of your responses.