To answer the question, 'What is the official currency of the country where the Eiffel Tower is located?', a system needs to break it down into smaller, sequential steps. Arrange the following sub-questions into the correct logical order that a system must follow to arrive at the final answer.

A user asks an information retrieval system: 'What is the primary language spoken in the country that hosted the 2016 Summer Olympics?'. To answer this, the system must break the query into a series of simpler, connected questions. Which of the following sets of sub-questions represents the most logical and efficient path to find the correct answer?

Deconstructing a Complex Query