Final answer:
Laura Baker is concerned with the reliability of evidence in auditing Smythe Manufacturing's assets, focusing on obtaining original documents to ensure authenticity and trustworthiness.
Step-by-step explanation:
Laura Baker is concerned with the reliability of the audit evidence while auditing the property, plant, and equipment of Smythe Manufacturing. The concern for evidence backed by original documents suggests a focus on the authenticity and trustworthiness of the documentation, which is a key attribute of reliable evidence. Original documents are typically considered more reliable than copies because they are less likely to have been altered and usually carry official marks or indicators that certify their legitimacy.