Plss help me with this one for. science i can't figure this out i need help

Your team is provided with two test materials, C and D. You test the two materials using the air hockey table to collide Object A with Objects C and D. The test material objects are the same size and shape and are very similar in mass. The results are shown in the diagram. The sizes of the arrows are proportional to the acceleration.

Apply Newton’s laws to determine which of these materials is more suitable as a liner for a safety
helmet. Explain your answer.