|Question 9Verbal

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Quality assessments of concrete typically focus almost exclusively on compressive strength as a measure of durability, overlooking other potentially relevant factors. Lisa Ptacek et al. therefore investigated the potential of gas permeability (vulnerability to incursion by gases), which is caused in part by excessive porosity, as a durability indicator. Their measurements and observations revealed that quality of conditions during the concrete curing phase negatively correlates with gas permeability and that high gas permeability values are associated with increased deterioration as concrete surfaces age.
Information in the text best supports which statement about Ptacek et al.'s findings?
They suggest that gas permeability testing presents a more reliable indication of concrete durability than compressive strength testing does.
A
They bolster the claim that concrete's susceptibility to damage decreases as its gas permeability increases.
B
They call into question the idea that quality of curing conditions directly affects concrete gas permeability but is unrelated to compressive strength.
C
They indicate that evaluation of gas permeability is an appropriate addition to concrete quality assessment procedures.
D