In Lango (Nilotic) the perfective is formed by replacing the final vowel of the verb root with -o. The root ‘cam’ (‘eat’) has the perfective ‘camo’. If the root ‘bed’ means ‘call’, what is its perfective?
Correct: B
The rule is simply to substitute -o for the final vowel. Since ‘bed’ ends in a consonant, the suffix -o is appended directly, giving bedo.