Tie for Two:
C and D deal with money
A and D I can see the unit rate,
I see a 10 in A and B
I see a 15 in A and B.

Thread for Three:
A, B, and D use whole numbers/positive integers
A, C, and D are not shapes,
In A, C, and D, I know how much for 1.

Fit for Four:
All 4 represent proportional relationships
All 4 have numbers.