What advances in technology developed during the Han Dynasty? A) paper, the lock and key, and the plow
B) silk looms, windmills, and papyrus
C) the collar harness, the wheelbarrow, and the phonetic alphabet
D) paper, the iron plow, and advanced water power to grind grain.

A) paper, the lock and key, and the plow

Explanation:

The Han Dynasty had some major technological advances in it's time. Some of these inventions are the salt reel, the bamboo drill, the seismograph, the magnetic compass, acupuncture, moxibustion, the chain pump, the crossbow, the kite, and paper.                                                                                                                     Hope this helps! :P

a. competition with other nations.

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.