As per sentence, these is NOT a meaning of dis-, di, dif include option C: before/ahead of.
Which is the meaning of dis-, di, dif-?
Dis-: Refers to separation; to set apart or asunder. Used in words such as disable and disagree.
Dif-: Refers to removal; to move away. Used in words such as difference and difficult.
Di-: Refers to negation; to deprave or undo. Used in words such as dissipation and divorce.
The term before is refers to as the period that define the action of time preceding a particular event of time. In simple words we can say that before is in front of someone or something.
The synonyms of before include prior to, previous to, earlier than, in preparation for, preliminary to and on the eve of.
On the other hand, ahead of refers to as the further forward in space, in the line of one's forward motion.
Therefore, correct option is C.
Learn more about Before, refer to the link:
https://brainly.com/question/1272937
#SPJ2
