The underlined portion of the sentence is treated as an indirect object.
Option D is the correct answer.
An object is mentioned in the sentence which obtains the action of the verb that may be either an individual or a thing.
In a sentence, the object can be direct or indirect. It is actually a noun pronoun or phrase of a noun on which the action is carried out by a verb. In the provided sentence, a mother is an indirect object as she receives the milk and the milk is the direct object as it is bought by john from the store.
Therefore, an indirect object is considered appropriate for the underlined portion of a sentence.
Learn more about the indirect object in the related link:
https://brainly.com/question/9700436
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