The Sentence ends with a string of "wh-" noun clauses. These clauses will not be concerns, so the last a single must also not be a question. "Which a single will be the best" is clearly an issue structure, so it makes sense that " CowperKettleCowperKettle 36.7k1818 gold badges138138 silver https://buyayurvedicproductsonline.data.blog/