The correct answer is C. interpersonal skills.

Interpersonal skills are the ability to communicate and interact effectively with others. They are essential for success in any field, but they are especially important for lower-level managers, who are responsible for supervising and motivating employees.

Lower-level managers need to be able to build relationships with their employees, resolve conflicts, and provide feedback. They also need to be able to communicate effectively with their superiors and with other departments within the company.

Interpersonal skills can be developed through training and practice. There are many resources available to help people improve their interpersonal skills, such as books, articles, and online courses.

Here is a brief explanation of each option:

  • Option A: Conceptual skills are the ability to think abstractly and to understand complex ideas. They are important for higher-level managers, who need to be able to develop and implement strategic plans.
  • Option B: Technical skills are the ability to use tools and equipment and to perform specific tasks. They are important for employees who work in technical fields, such as engineering and manufacturing.
  • Option D: None of these: This option is incorrect because lower-level managers do need interpersonal skills.