Which arrangement of data points in a scatterplot would indicate no apparent correlational relationship?

Group of answer choices

a. Data points being evenly spaced throughout the entire scatterplot

b. Data points forming a tight pattern going from the top-left to the bottom-right of the scatterplot

c. Data points forming a horseshoe-like shape on the scatterplot

d. Data points forming a tight pattern going from the bottom-left to the top-right of the scatterplot