Hi there!
The answer is 3. review the notes as soon as the lecture is over, if possible.
Since reviewing right after a great deal of information is thrown at you is proven to make you remember the details or notes better, reviewing at this time is crucial if you want to remember something well and for a long time. All other options are not applicable, since option 1 causes you to take notes slower, leading to missing notes, option 2 is not good for your studying since writing helps you learn, and in option 4, you may forget a lot of information before you can get the notes down, and it is best to be taking notes as the lecture is being conducted.
Hope this helps!
