Statement–Assumption (Circus Extends Show for Two More Weeks): Statement: Considering the tickets sold during the last seven days, the circus authorities decided to continue the show for another fortnight including two weekends. Assumptions: I) People may not turn up on weekdays. II) The average number of visitors over the next fortnight will be similar to the last seven days (especially around weekends). III) There may not be enough response at other locations.

Introduction / Context:
Extending a show based on recent sales assumes that demand will persist at a comparable level in the immediate future, especially capturing weekend peaks.

Given Data / Assumptions:

• Observation window: last 7 days of ticket sales.
• Decision: extend by 14 days, including two weekends.

Concept / Approach:
The necessary assumption is stability or predictability of demand within a short horizon. Hypotheses about weekday weakness or alternative locations are not required for the decision stated.

Step-by-Step Solution:
I: “People may not turn up on weekdays” is an unneeded generalisation; even if weekdays are weaker, the decision can still be justified by weekend strength. Not implicit.II: The extension relies on sales holding roughly steady, otherwise prolonging would be risky. Implicit.III: Response at other locations is irrelevant to the on-site extension choice. Not implicit.

Verification / Alternative check:
Short-term event extensions commonly extrapolate from immediate past performance—this is exactly II.

Why Other Options Are Wrong:
“I and II” adds an unnecessary weekday premise; “All” bundles irrelevant III; “None” ignores the basic extrapolation logic.

Common Pitfalls:
Over-reading fine-grained attendance patterns when the decision only requires overall continued viability.

Final Answer:
Only II is implicit.