How could the following sentence be edited to include academic vocabulary? Choose the sentence that has the most formal, academic style.
1) The inventor came up with a way to cut out the poisonous part.
2) The inventor cooked up a way to make the poisonous bit solitary.
3) The inventor discovered a way to isolate the poisonous element.
4) The inventor invented a way to keep away the poisonous sections.
5) The inventor thought up a way to separate the poisonous part from the other parts.
