Read the following sentence and answer the question.

The production team rented discs of Star Trek II: The Wrath of Khan; O Brother, Where Art Thou?; and Goodbye, Mr. Chips.

Which of the following uses of a semicolon is applied in this sentence?

to join independent clauses closely related in thought
to separate clauses, phrases, or series that might be confusing if commas alone were used
to separate items in a series of phrases that would ordinarily be separated be commas except that they already contain commas
to join independent clauses that appear to be connected by a conjunctive adverb