Statement — Most private companies decided against awarding annual salary increases for the previous year due to the current economic situation.\n\nAssumptions —\nI. A majority of employees may resign in protest.\nII. These companies may announce salary hikes next year.

Introduction / Context:
The statement explains a decision for the current period tied to economic conditions. It does not presuppose a mass resignation by employees, nor does it commit to or imply a future raise in the next period. The reasoning is confined to present constraints, not predictions about employee reactions or promises regarding future policy.

Given Data / Assumptions:

• Decision: no annual increase for the period, citing economy.
• I: claim about majority resignations.
• II: claim about future salary hikes.

Concept / Approach:
A present-tense, constraint-driven decision does not logically require assumptions about extreme employee responses or future reversal. At most, it assumes cost control is necessary. Therefore neither I nor II is necessary to make the statement coherent or justified.

Step-by-Step Solution:

Verification / Alternative check:
The statement remains valid whether or not resignations occur and whether or not next year brings increases. This independence shows I and II are not presupposed.

Why Other Options Are Wrong:

Common Pitfalls:
Reading policy statements as predictions; here it is only an explanation for the current decision.

Final Answer:
Neither Assumption I nor Assumption II is implicit.