<p>Mr. Lewis is <u><b>primarily</b></u> responsible for inspecting products and supervising quality assurance procedures.</p><p>The word "primarily" is the correct answer in this context. It means that Mr. Lewis's main or most important responsibility is to inspect products and supervise quality assurance procedures.</p><p>The other options can be eliminated:</p><p><b style="font-size: 13.008px;">(A) systematically</b><span>: This word means that Mr. Lewis is responsible for inspecting products and supervising quality assurance procedures in a systematic manner. However, the sentence does not provide any information about the specific approach or method Mr. Lewis uses, so this option is incorrect.</span></p><p><b style="font-size: 13.008px;">(B) experimentally</b><span>: This word means that Mr. Lewis is responsible for inspecting products and supervising quality assurance procedures in an experimental or trial-and-error manner. However, this does not make sense in the context of quality assurance, as it is important to have established procedures and standards. Therefore, this option is incorrect.</span></p><p><b style="font-size: 13.008px;">(D) nearly</b><span>: This word means that Mr. Lewis is responsible for inspecting products and supervising quality assurance procedures almost to the extent required. However, this does not accurately describe Mr. Lewis's responsibility, as the sentence states that he is primarily responsible, not just nearly responsible. Therefore, this option is incorrect.</span></p>