Answer:
The sentence that is punctuated correctly is:
1. I wouldn't eat those cabbages if I were you.
Explanation:
We may be tempted to add a comma when we see "if" in a sentence, but we must think twice before we do. We will only need that comma if the clause that contains the "if" is the first one. For example:
- If you see her, tell her to call me.
However, when the if-clause is the second one, there is not need for the comma at all:
- Tell her to call me if you see her.
With that in mind, we can choose the first option as the correct one:
1. I wouldn't eat those cabbages if I were you.