The answer choices are spelling rules about what to do before adding suffixes to a base word that ends in a consonant. Identify the rule that was applied to the word below.

benefit + -ing

Do not double the final consonant if the suffix begins with a consonant.
If a base word ends in more than one consonant, just add the suffix without changes.
If a base word has three or more syllables, do not double the final consonant.
If a base word has only one syllable and ends in one consonant, double the final consonant.
If a base word ending in one consonant has two syllables, and the first syllable gets the accent, do not double the final consonant.
If a base word ending in one consonant has two syllables, and the second syllable gets the accent, double the final consonant.