Answer:
C
Step-by-step explanation:
The ratio of frames : containers can be calculated using values from table.
3 : 12 = 7 : 28 = 9 : 36 = 1 : 4 ← in simplest form, thus
Number of containers is 4 times the number of frames
Thus for 5 picture frames the number of containers = 5 × 4 = 20 → C
