How did the song improve upon the tang version of the civil service system?

they mandated that most officials came from the military.
they made the examinations easier to pass.
they opened up the system to more people. t
hey required students to earn their degrees in three years.

d

step-by-step explanation:

an inequality is an expression which means more than one number is a solution. we graph the solutions on a number line to show all possible values. we graph using circles and arrows.

this is a filled in circle on -2 so this is . this means only answers c and d are options.

answer d points to the right.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering