In the English language, the normal order of words in a sentence is: subject + verb + object. The subject is the performer of the action (verb) and the object is the receiver of that action.
In the given sentence, the indirect object "at the dog" is placed before the verb "hurled", whereas it should be placed after. Hence the sentence requires change and option A is incorrect.
Option B is correct as the sentence follows the normal word order subject (The boys) + verb (hurled) + object (stones, at the dog).
Option C is incorrect because the words are not in the required order, they're in this order: object + verb + subject.
Option D is incorrect because the direct object "stones" is placed before the verb.