Fill in the blank with a suitable preposition.
She came to work _______ her newborn baby.
The preposition ‘with’ is used to refer to being accompanied by someone/something or carrying something. In the sentence, the person is accompanied by ‘her newborn baby’ therefore ‘with’ is an apt answer. Hence option D is correct. On the other hand ‘at’ and ‘by’ are unsuitable here because ‘at’ is used to denote a place/organisation, whereas ‘by’ is used to indicate the agent of an action. The ‘baby’ is neither a place nor an agent, therefore, options A and B are incorrect. Similarly ‘of’ would be unsuitable because ‘of’ is used to denote belonging. The sentence here doesn’t denote belonging instead attempts to highlight that the person is accompanied by ‘the newborn’. Thus option C is incorrect.