Answer:
(C) Where her long hair sticks to the mouse pad, covers the keyboard, and clings to the screen of the monitor.
Step-by-step explanation:
A sentence fragment is a part of a sentence that is incomplete, a fragment of the whole sentence. In simple words, a sentence fragment is a group of words that do not make a complete thought and needs other words to make a complete sentence.
In the given options, option C is a sentence fragment as it is an incomplete sentence. "Where her long hair sticks to the mouse pad, cover the keyboard, and clings to the screen of the monitor" do not form a complete thought, and presents just a partial part of a whole sentence.
Thus, the sentence fragment is option C.