Answer:
B. An American business person discovered a stockpile of King Tut's items
Step-by-step explanation:
Independent Clause:
An independent clause can stand alone by itself as a complete sentence i.e. it gives complete sense, thought or idea.
Independent clause has three components, i) a subject, ii) a verb, iii) and a complete expression of a thought action or idea.
Dependent clause:
Dependent clause may have one or more than one components of the independent clause, but it always lacks complete expression of a thought. It cannot stand alone in offering the complete sense.
Of the options provided, option A, C, and D lack subject, and do not fully create sense of the information or action.
Option B has subject (An American business person), a verb (discovered), and completely expresses the idea/action, so it is an independent clause.