Which of the following scenarios would have been possible for the first time during the song dynasty?
a. a chinese emperor calls for military operations to expand china's borders.
b. a poor farmer takes a test in hopes of earning a government job.
c. a muslim sailor uses a magnetic compass to navigate from china to india.
d. a confucian scholar makes woodblock prints of his philosophical beliefs.

C. A Muslim sailor uses a magnetic compass to navigate from China to India is the correct answer.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.