Question

when rewriting the conclusion of an argumentative essay, a writer should include
an effective counterargument.
new supporting evidence.
new opinions.
an effective transition.

Explanation:

The conclusion of an argumentative essay should tie together ideas without introducing new counterarguments, evidence, or opinions (which belong in body paragraphs). An effective transition helps connect the conclusion to the rest of the essay, ensuring coherence.

Answer:

an effective transition.