Discussion
Which hose construction reduces permeation?
Answer: A
Multilayer hoses combine a barrier liner with a durable outer. The last option describes exactly that construction, which makes it a correct and more detailed version. Substituting ordinary hose defeats it. Tracing the requirement back to the physical constraint that produces it makes the answer follow. The order in which the effects act is what decides the outcome, so it is worth establishing first. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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