I have a situation like this:
My friend: Can you help me with this?
Me: Yes, You should do like this. And you can do another way like this
My friend: Thanks, I get it.
Me: I will give you another example to make you understand more.
My friend: __________(*)________________No need to explain more.
(1) I understood the matter from one of your previous examples. No need to explain more.
=> My native friend advised using the simple past. He said this one s natural.
(2) I 've understood the matter from one of your previous examples. No need to explain more.
=> I think that "'ve understood" is also good to use. I want to use the present perfect because I want to focus on the present result that now I understand.
(3) I understand the matter from one of your previous examples. No need to explain more
=> I think that this one is also good to use.
The thing I am concerned the most is that between the use of simple past and present perfect for this situation. Could you please give me your opinion?