In the following question, a sentence is given having two blanks in it followed by 5 options. Each option contains a pair of words. Choose the option which contains the correct pair of words that can be filled in both the blanks respectively to make the sentence contextually and grammatically correct. In order to ___________a seamless experience for the over seven lakh visitors expected in this edition, significant ____________have been made in collaboration with the national and State authorities.

"Ensure" means to make certain that something happens, which fits the idea of guaranteeing a smooth experience for visitors. "Improvements" refers to enhancements or upgrades, aligning with the context of better arrangements made in collaboration with authorities."Ascertain, adjustments" – "Ascertain" means to confirm or verify, which does not fit the meaning of guaranteeing a seamless experience."Warrant, compromises" – "Warrant" means to justify, and "compromises" implies making concessions, which has a negative connotation in this context."Jeopardize, enhancements" – "Jeopardize" means to put at risk, which contradicts the intended meaning of ensuring a seamless experience."Facilitate, setbacks" – "Facilitate" means to make something easier, but "setbacks" refers to obstacles, which does not match the context of positive developments.Thus, "ensure, improvements" is the best choice.