Answer:
A. Phone repair requires detailed knowledge of how phones work.
Explanation:
Technical terms refer to words related to a particular subject or science. In that matter, a phone repairman's manual constains specific vocabulary concerning the components of a phone, inside and outside, as well as how those parts function in combination to make a phone work.
The rest of the alternatives are incorrect because they do not involve the fact that a phone manual has more technical terms than a television guide.
