Question

Which revision corrects the faulty parallelism? Duke Kahanamoku promoted the sport of surfing as well as popularizing it.

Answer 1

The correct answer is: Duke Kahanamoku promoted the sport of surfing as well as popularized it.

This sentence is parallel because the two actions -- or verbs -- are in the same form: promoted and popularized.

Any sentence that uses promoted/popularizing OR promoting/popularized is incorrect. These verbs need to be in the same form -- either both must end in -ed or both must end in -ing.

Answer 2

Duke Kahanamoku promoted the sport of surfing as well as popularized it.