Final answer:
Both revision options 'to 1933, but the building' or 'to 1933. The building' are acceptable corrections to the comma splice error in the underlined sentence.
Step-by-step explanation:
The underlined selection in the paragraph 'The idea for a national theater or cultural center in Washington, D.C., dates back to 1933, the building we commonly call the Kennedy Center did not open until 1971.' contains a comma splice, which is a type of run-on sentence where two independent clauses are incorrectly joined by a comma. The correct way to fix this error is by either using a conjunction or separating the clauses into two distinct sentences. Therefore, the acceptable revisions are 'to 1933, but the building' or 'to 1933. The building'. This means that both revision options presented are acceptable.