The best evidence and explanation that show how the historical setting contributes to the effect of personification in the passage is:
“But there was no silence; all the time the motor omnibuses were turning their wheels and changing their gear; like a vast nest of Chinese boxes all of wrought steel turning ceaselessly one within another the city murmured;” This shows how a bus of the time moved in the city.
This response effectively connects the historical setting, with the mention of motor omnibuses as part of urban life in that era, to the personification of the city as a living entity ("the city murmured"). It highlights the bustling atmosphere of the time and how technological advancements contribute to the environment's vibrancy, thus enhancing the personification in the passage.