A conclusion is:

A) an argument with only one premise
B) an argument with at least two premises
C) an argument to which there is no possible response
D) the proposition for which an argument provides evidence
E) whatever proposition a speaker says last

Conclusion

The final part of something, such as an argument or piece of writing, summarizing the main points or outcomes.

Proposition

A statement that can either be true or false but not both.

Argument

A unit of reasoning in which one or more propositions (the premises) purport to provide evidence for the truth of another proposition (the conclusion).