If reviewers do not have an adequate level of technical knowledge, they may not be able to identify and describe anomalies in the product or project under review1. They may also not be able to provide constructive feedback or suggestions for improvement2. This can result in a less efficient review, as the review objectives may not be met, the review process may take longer, or the review outcome may be of lower quality3. Therefore, option C is the correct answer. Option A is incorrect because having sufficient business knowledge is not enough to perform a technical review, as business knowledge does not cover the technical aspects of the product or project4. Option B is incorrect because having sufficient process knowledge is not enough to perform a technical review, as process knowledge does not cover the technical aspects of the product or project4. Option D is incorrect because skipping any technical aspect can compromise the quality and completeness of the review, and may lead to defects or risks in the product or project5. References: 1: ISTQBGlossary, Reviewer 2: ISTQB Advanced Level Test Manager Syllabus, Section 2.2.2 3: ISTQB Advanced Level Test Manager Syllabus, Section 2.2.3 4: ISTQB Advanced Level Test Manager Syllabus, Section 2.3.1 5: ISTQB Advanced Level Test Manager Syllabus, Section 2.3.2