Observe the net above (srry i cant show the picture). It is made out of a strong, man-made nylon cord. It is tough and long-lasting because it is made from a type of polymer. What does this mean? a. there are cubic molecules throughout the cord
b. there are chains of repeating molecules throughout the cord
c. there are only 4 elements in this cord that will give it strength
d. there are many heterogeneous mixture in this cord that make it stronger