A. illogical, "corruption" is an "improper means", but it can never be restricted by "proper", which is grammatically improper and logically improper. B. The composition is incomplete. "Under …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… C. The sentence mix "around improving product quality" and "focusing on improving product quality" can be changed to "in technological innovation, the company organizes relevant personnel to focus on improving product quality", and in technological innovation, the company organizes relevant personnel to focus on improving product quality. "