Difficulty: Easy
Correct Answer: Both I and II follow
Explanation:
Introduction / Context:In steep terrain, landslides threaten railway safety. Effective policy must both detect hazards early and reduce the likelihood of debris reaching tracks. The proposed actions address these two fronts: operational monitoring and physical slope stabilization.
Given Data / Assumptions:
Concept / Approach:
Step-by-Step Solution:
Course I addresses immediate operational safety by scouting the line and warning following trains.Course II addresses root causes by physically limiting rockfall and debris movement toward the track.Together, they form a layered defense—both are logical and relevant.Verification / Alternative check:
Real-world railways deploy patrols, pilot engines in monsoon seasons, rockfall barriers, nets, and retaining structures—these mirror I and II.Why Other Options Are Wrong:
Only I / Only II: Each alone leaves a gap—either no prevention or no early warning.Either I or II: Not an either–or; a combined approach is safer.Neither: Ignores the clear causal risk stated.Common Pitfalls:
Assuming a single measure suffices in complex terrain; safety typically needs both engineering and operational controls.Final Answer:
Both I and II follow
Discussion & Comments