The map shows the territories of the dynasties the ruled china during the middle ages. what can you infer about china during the middle ages based on the map? A: the chang river connected the northern and southern parts of china during the middle ages.
B: the sui dynasty conquered most of asia continent during the middle ages
C: the song dynasty created the grand canal system in china during the middle ages
D: the tang dynasty was the most successful empire in china during the middle ages