In order to decide which measure of central tendency is appropriate, you must first determine
a. The appropriate graph to use and the independent variable
b. The independent and dependent variables.
c. How the data will be collected
d. The scale of measurement being used and the shape of the distruibuion.
D is correct as levels of measurement will preface the manner in which you will calcluate the measure of Central Tendency of a give data.
Levels of Measurement: Measurement scales differ ...
Statistics : Measure of Central Tendency