Stone testing in civil engineering: pick the correct statement(s) about standard laboratory tests used to assess suitability of stones for construction and roads. Choose the most comprehensive correct option.

Introduction / Context:
Different tests characterize stones for durability and loading conditions. This question checks your ability to match tests with the engineering property they quantify.

Given Data / Assumptions:

• We consider common tests: acid, attrition, crushing, and impact.
• Each test targets a distinct property required in practice.

Concept / Approach:

Acid test indicates resistance to chemical weathering. Attrition test simulates abrasion in road traffic. Crushing test provides compressive strength values. Impact test measures toughness, important for aggregates under impact loads.

Step-by-Step Solution:

Verification / Alternative check:

Codes and handbooks list these test-property pairs; results inform material selection for masonry and pavement layers.

Why Other Options Are Wrong:

Selecting any single item ignores other correct statements and provides an incomplete answer.

Common Pitfalls:

Confusing impact with crushing; assuming attrition equals polishing value—though related, the specific apparatus and metrics differ.

Final Answer:

All the above