Design instability may be caused by

Design instability may be caused by

• A. It is caused by application, manufacturing and insufficient.
• B. It is caused by external weather conditions only.
• C. It is caused by all of the above.
• D. NOT application, manufacturing and Insufficient.

Answer: (D)

The main idea here is recognizing how to handle negation in a question about what can cause design instability. The statement that says design instability is not caused by application, manufacturing, and insufficiency is the one that uses a negated claim. In this format, the test is asking you to identify what is not a cause among the listed possibilities. Since the other options either assert a cause (or an overly broad “all of the above” claim) or rely on an external factor like weather, the negated option becomes the safest, most defensible choice given the wording. It signals that, according to how the question is framed, those particular factors are not considered causes in this context, leaving room for other, unspecified factors to be responsible. In practice, design instability can arise from a mix of issues beyond those three, but the item is testing your ability to parse the negation and avoid assuming a cause that isn’t supported by the statement.

The main idea here is recognizing how to handle negation in a question about what can cause design instability. The statement that says design instability is not caused by application, manufacturing, and insufficiency is the one that uses a negated claim. In this format, the test is asking you to identify what is not a cause among the listed possibilities. Since the other options either assert a cause (or an overly broad “all of the above” claim) or rely on an external factor like weather, the negated option becomes the safest, most defensible choice given the wording. It signals that, according to how the question is framed, those particular factors are not considered causes in this context, leaving room for other, unspecified factors to be responsible. In practice, design instability can arise from a mix of issues beyond those three, but the item is testing your ability to parse the negation and avoid assuming a cause that isn’t supported by the statement.