Identify the errors in the given sentence and choose the sentence that rectifies these errors.
My idea can be key idea for cracking difficult conflicts of extremely high level.
1
My idea can be an key idea for cracking difficult conflicts of an extremely high level.
2
My idea can be key idea for cracking difficult conflicts of an extremely high level.
3
My idea can be a key idea for cracking difficult conflicts of a extremely high level
4
My idea can be a key idea for cracking difficult conflicts of an extremely high level.