Which of the following is most likely the next step in the series?

C.

Step-by-step explanation:

The pattern keeps adding 2+2

for the first pattern we have 2 dots

second one is 2+2+2

third one is 2+2+2+2

and so the 4th one would be 2+2+2+2+2

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers