Concept:The correct phrasal verb for stopping or giving up a habit is "come off".
Explanation:In this sentence, Regina wants her son to stop smoking, which means she wants him to quit that habit.
The phrasal verb "come off" is commonly used to indicate getting rid of a habit, such as smoking or taking drugs.
For example, a doctor may tell a patient to "come off" certain medicines.
The other options do not match the required meaning.
"Come out" means to appear, emerge, or become known, not to quit a habit.
"Come over" means to visit someone or move across to another place, which is unrelated to smoking.
"Come from" means to originate from a particular place or source, which also does not fit the context.
Therefore, the sentence should read: Regina pleaded with her son to come off the habit of smoking.
Answer:come off (Option C)