In the sentence "Italian artists were more active in the quattrocento than in the sixteenth century which followed. " The meaning of quattrocento can be inferred from the clue of ______.

A．Old English borrowed heavily from Latin and other languages.
B．Old English has a vocabulary of 50,000 to 60,000.
C．The English language from 450 to 1150 is referred to as Old English.
D．Old English was more inflected than Modern English.

A．the progress made in science and technology
B．changes in geography
C．alien cultural and linguistic influence on English
D．social and economic changes