Which Example Depicts the Use of Technical Skills

Which example depicts the use of technical skills?

A) a web designer's ability to use HTML code, Illustrator design software, and search-engine optimization
B) a restaurant server's ability to help customers make choices, laugh, and feel at ease
C) a research scientist's ability to create a hypothesis, articulate it clearly, and test it thoroughly
D) a top manager's ability to understand the big picture and how parts relate to the whole
E) a high school teacher's ability to be approachable, to entertain as well as inform, and to inspire respect in his students