A training program in which a craft is learned from those who have mastered the craft and focuses on learning by doing is called a(n)

you have to put the graph on here with the question

step-by-step explanation:

answer: it is a.,b.,d.

step-by-step explanation:

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.