using the divergence event labeled 3, an open circle, you would expect 25 amino acid changes/kb between descendent lineages if using gene b as the molecular clock.

The answer should be d.

My answer is b but i dont know if im right

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form

Maybe because district 12 has low chances of winning?