Does this example contain a sentence fragment, a run-on sentence, a case of a comma splice or a properly punctuated sentence? "A celebrity dentist said he was booted from an American Airlines flight that was scheduled to depart from Los Angeles to New York on Sunday. After he made a wisecrack about Trump's immigration policies when he saw a Spanish-speaking boy crying and running down the aisle."
a. sentence fragment
b. run-on sentence
c. correctly punctuated sentence
d. comma splice