Which of the following best represents the meaning of "patent"?

The term "patent" primarily refers to something that is clearly visible or evident, making option C the best representation of its meaning. In various contexts, particularly legal and intellectual property, a patent protects an invention that is unique and openly acknowledged; thus, it underscores the concept of being clear and unambiguous. This notion aligns with how "patent" describes something that stands out as obvious or can be easily recognized in everyday language.

The other meanings provided do not accurately reflect the essence of the word. Describing something as complex and intricate undermines its clarity, while referring to qualities like obscure, difficult to see, hidden, or secretive directly contradicts the straightforwardness implied by "patent." The emphasis on visibility and obviousness is key to understanding the correct choice.