Vinyl plastics — articles prepared from vinyl resins (e.g., PVC) typically exhibit which characteristics? Select the most comprehensive statement.

Introduction / Context:
Vinyl resins, notably polyvinyl chloride (PVC) and its copolymers, are among the most widely used plastics for pipes, profiles, films, and cable insulation. Their base polymer is inherently colourless and can yield a wide range of optical and mechanical properties through additives and processing. This question asks you to identify the collective characteristics typically associated with vinyl plastics in general building and consumer applications.

Given Data / Assumptions:

• Considering properly stabilized, plasticized or unplasticized vinyl compounds as commercially used.
• Normal ambient service without thermal decomposition.
• Color and opacity may be modified by pigments and fillers.

Concept / Approach:
Virgin PVC is essentially colourless and can be formulated to be transparent or opaque. It is generally odourless and, when adequately stabilized, considered non-toxic in normal use scenarios (e.g., potable water pipes with appropriate approvals). Additives may impart color, opacity, or flexibility; none of these negate the intrinsic properties of the base resin under typical use conditions.

Step-by-Step Solution:

Verification / Alternative check:
Datasheets for PVC pipes, sheets, and films cite the above characteristics, noting that performance depends on stabilizers, plasticizers, and processing conditions.

Why Other Options Are Wrong:
Each single property is true but incomplete; the aggregate answer recognizes all relevant characteristics simultaneously.

Common Pitfalls:
Confusing degradation byproducts (e.g., HCl on overheating) with normal-use safety; mixing up pigment-induced color with base polymer's inherent colourlessness.

Final Answer:
All of these