Use of fertilizer *crop rotation

*use of seedlings

*improved irrigation

*new types of plows

The above list describes agricultural improvements under the

A.

Song Dynasty.

B.

Sui Dynasty.

C.

Yuan Dynasty.

D.

Ming Dynasty.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

the 9th amendment

explanation:

i think its 5! hope i

to keep us neatruel and not get involved in any wars

he assumed control of treaty negotiations with a hostile power