The Human Wrist Is Very Agile, but Because of This

The human wrist is very agile, but because of this agility it is also very prone to injuries involving the tissue connecting the wrist bones. This statement illustrates that animal structures

A) fit their functions and that nervous tissue can be damaged.
B) fit their functions and that muscle tissue can be damaged.
C) are not perfect and that muscle tissue can be damaged.
D) are not perfect and that connective tissue can be damaged.