Peaceful anti-government demonstrations in 1989 effectively brought about change in Czechoslovakia during the . A. Dissolution B. Civil war C. Velvet Revolution D. Islamic Revolution Please select the best answer from the choices provided. A B C D.

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Explanation:

answer; i believe that the correct answer is (scientific approach)

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !