Statement–Assumption — City police request: “Mail your grievances and confidential information to the Commissioner of Police.” Assumptions: I) People across categories may have grievances or information to share. II) Citizens have blind faith in the efficiency of the vigilance branch’s flying squad. Choose the implicit assumption(s).

Introduction / Context:
Authorities invite citizens to send grievances and confidential tips to the Commissioner. Such outreach presupposes that members of the public possess relevant complaints or information that could aid policing. It does not depend on citizens having “blind faith” in a particular operational unit like the flying squad; the channel specified is the Commissioner’s office, which can route matters appropriately.

Given Data / Assumptions:

• Call to action: email grievances and confidential information to the Commissioner.
• Assumption I: citizens (across categories) may have grievances/tips worth reporting.
• Assumption II: people have blind faith in the vigilance flying squad’s efficiency.

Concept / Approach:
Assumption I is necessary: if the public had nothing to report, the channel creation/request would be futile. The quantifier “all categories” should be read in the practical sense that grievances can come from any segment, not that every single person has one. Assumption II is irrelevant and too specific; the message does not reference the flying squad, nor does it require “blind faith.” Even if trust were mixed, the Commissioner’s channel could still be useful and legitimate.

Step-by-Step Solution:

Verification / Alternative check:
Citizen reporting portals work even when trust is imperfect; multiple oversight mechanisms and audit trails can compensate.

Why Other Options Are Wrong:
“Only II” misplaces the locus of trust; “either” overstates; “neither” ignores the fundamental premise that tips exist; “None of these” implies both are required, which they are not.

Common Pitfalls:
Overreading precise organizational preferences into a simple reporting request.

Final Answer:
Only Assumption I is implicit.