Answer: I would contend that the right answer is actually the C) Technical language.
Explanation: Just to elaborate a little on the answer, it can be added that by using nouns and verbs such as horseback riding, participated, course, carabiner clips, and rappelled off, just to name a few, the author has primarily used a technical and formal language, which requires a specific knowledge of those two activities—riding and climbing. This section of the blog is very objective, so I would argue that the language does not have positive or negative connotation. In addition, the use of hyperbole in a text requires exaggeration, or an attempt to make something or someone sound or look significantly better or worse than another thing or person. Although the author seems confident in his/her abilities, he/she is not using hyperbole in this part of his/her account.