Which choice completes the text so that it conforms to the convention…

Source Texts

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Author Jeffrey Auerbach disputes claims that London's Great Exhibition of 1851 was a show of Victorian-era England's economic _____ citing previously unpublished records of the exhibition's planning commission, Auerbach makes the compelling argument that the event was foremost an attempt to boost a stagnating economy, not celebrate its supremacy.

Which choice completes the text so that it conforms to the conventions of Standard English?

might and

might,

might by

might;