Does the Change Actually Work?

3 questions. Choose the meaning or usage that best fits each situation. Try answering before reopening the passage.

1What makes the improvements' effect cumulative?A. It develops as successive smaller contributions build on one another over the trials.B. It is inferred from one unrelated customer comment.C. It depends entirely on the label color without any other changes.D. It exists only for a single moment and leaves no later effect.

2Information without which customers cannot identify their parcels is _____ to the collection process.A. negligibleB. irrelevantC. incidentalD. crucial

3Which difference is insignificant for finding the correct parcel as described?A. A slight border-width change that leaves all identifying information equally readable.B. Removing every customer's name from the labels.C. Placing an opaque screen across the entire shelf.D. Mixing up all the collection dates without correction.

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