<p>The correct answer is <strong>(C) tentative</strong>.</p><p>The word "still" suggests that the plan to launch the new product next month is not final or definite. It is subject to change or uncertainty. The word "tentative" means uncertain or not fully confirmed. Therefore, it is the most suitable choice to fill in the blank.</p><p>The other options do not fit the context:</p><p><strong style="font-size: 13.008px;">(A) partial</strong><span style="font-size: 13.008px;">: This means incomplete or not whole, which does not convey the intended meaning of uncertainty in the context.</span></p><p><strong style="font-size: 13.008px;">(B) incidental</strong><span style="font-size: 13.008px;">: This means happening by chance or as a minor part of something else, which does not relate to the idea of the plan being uncertain.</span></p><p><strong style="font-size: 13.008px;">(D) exemplary</strong><span style="font-size: 13.008px;">: This means serving as a model or example, which is unrelated to the idea of the plan being uncertain.</span></p>