Here is the original item:
A student fascinated with all things ancient
Egyptian. (A)
Kemette squinted at the computer
screen,
(B) hoping
to find the information she needed
(C) to finish
her research paper on Old Kingdom art.
You wanted to do this:
A student fascinated with all things ancient Egyptian. Kemette squinted
at the computer screen. Hoping to find the
information that she needed to finish her research paper on Old Kingdom
art.
Adding a period after screen creates a fragment. Hoping to find the information ... is a participle phrase, which cannot stand alone as a complete sentence.
You might want to review the rules.