Why do you think patrons commissioned artist ?

Explanation: According to humanist philosophies, art was morally uplifting for all of society. So when patrons commissioned a major work of public art, it was seen as a gift to the people. This added a final motivation for patrons to commission art, as a way to increase their fame and immortalize their legacies.

the answer for 3 is b and the answer for 4 is d

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.