Final answer:
The correct verb to complete the sentence is 'aprendan'.
Step-by-step explanation:
The correct verb that completes the sentence is aprendan.
When the subject of a sentence is 'ustedes' (meaning 'you' in the plural form), the corresponding verb ending in Spanish is '-an'. Therefore, the correct option is C.
For example, 'Ustedes aprendan sobre el país donde van a residir' translates to 'You all learn about the country where you are going to reside'.
Learn more about Spanish verbs