Final answer:
The root 'fract' in 'Fraction' is a locked root as it cannot stand alone. 'Free' in part B is a free root because it is a stand-alone word, and similarly, 'lock' in word C is a free root as it also stands alone.
Step-by-step explanation:
To determine whether the root of a word is locked or free, one must identify if the root can stand alone as an English word (free root) or if it is bound and cannot stand alone, requiring a prefix or suffix to make sense (locked root). In the context of the word 'Fraction', 'fract' is the root, and it is considered a locked root because it cannot stand alone without a suffix like '-ion'.
For part B, the word free is given which happens to be a free root itself, as it is a complete English word that doesn't require any suffixes or prefixes to make sense. The root of words such as 'write', 'wrote', and 'written' is also free, as the component 'writ' can stand on its own (as in the archaic word 'writ'). Lastly, considering word C 'locked', the root is 'lock', and it is a free root because 'lock' is a complete word by itself.