Which pair of objects will have the least gravitational attraction to each other

a: 2 concrete blocks 6 cm apart
b: 2 marbles 12 cm away
c: a concrete block and a marble 6 cm apart
d: a concrete block and a marble 12 cm apart

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There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.