Question

to demonstrate that the integrity of underground metal pipes can be assessed without unearthing the pipes, engineer aroba saleem and colleagues ______ the tendency of some metals internal magnetic fields to alter under stress: the team showed that such alterations can be measured from a distance and can reveal concentrations of stress in the pipes. which choice completes the text with the most logical and precise word or phrase? a) hypothesized b) discounted c) redefined d) exploited

Explanation:

The team used the tendency of metals' internal magnetic - field changes under stress to assess pipe integrity. "Exploited" means to make use of something for a practical purpose, which fits the context as they used this property to measure stress concentrations from a distance. "Hypothesized" means to propose a hypothesis, which is not what they did here as they showed it could be done. "Discounted" means to regard as unimportant or to ignore, which is the opposite of what they did. "Redefined" means to give a new definition, which is not relevant in this context.

Answer:

D. exploited