Which statement best evaluates the effectiveness of this conclusion paragraph?

Thesis: By mixing their friendship, a little help from the French, and a World's Fair, Morrison and Wharton created the recipe that would give rise to cotton candy
Main Points:
1. The unusual friendship between Morrison and Wharton
2. The cotton candy recipe
3. Successful debut at World's Fair
Conclusion: By mixing their friendship, a little help from the French and a World's Fair, they created the recipe that would give rise to cotton candy. Even though the dentist and candymaker had little in common, the two friends were united by cotton candy. Even more unusual is that their World's Fair debut led to millions of happy children a hundred years later. Their invention proves that some of the best combinations come from the most unlikely friendships

A. The conclusion is effective because it adds new information not addressed in the main points
B. The conclusion is ineffective because it does not summarize the main points of the essay
C. The conclusion is ineffective because it fails to restate the thesis statement in a new way.
D. The conclusion is effective because it uses a satisfying closing statement​