Which revision corrects the faulty parallelism? Duke Kahanamoku promoted the sport of surfing as well as popularizing it.
Popularizing the sport of surfing as well as promoted it was Duke Kahanamoku.
Duke Kahanamoku promoted the sport of surfing as well as popularized it.
Duke Kahanamoku promoted not only the sport of surfing but also popularized it.
Duke Kahanamoku popularized the sport of surfing as well as promoting it.