The correct answer is A) approximately 1/2 inch shorter than the measured length to allow for the use of wedges. When installing shoring, you want to cut the shoring slightly shorter than the measured length in order to leave room for the use of wedges. Wedges are used to tightly secure the shoring in place and prevent any gaps or looseness. Cutting the shoring about 1/2 inch shorter than the measured length provides the necessary space to properly install the wedges without the shoring being too tight of a fit. The other answer choices are incorrect because: B) cutting the shoring to the exact measured length would not allow for the use of wedges, C) cutting it longer would require additional trimming which is not the preferred method, and D) shortening it by 1/2 inch per foot is too much and would create an unstable fit.