How were officials chosen for government positions within the tang dynasty? loyal friends were placed in official positions. positions were handed down from father to son. wealthy landowners paid for government posts. civil service exams identify skilled workers.

Civil service exams helped identify skilled workers.

Civil service exams helped identify skilled workers

Explanation:

During The Tang Dynasty one of the the major achievement it had was the establishment of the imperial exam as a pathway to office. with this exam the identification of skilled workers was easier to establish and these skilled helped perform jobs efficiently  

mining and farming towns developed

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the answer is b. 300t + 3/2xt