What term describes the twisting and intertwining of enamel rods found at the cusps and incisal edges of a tooth?

Explanation

The correct answer is B, gnarled enamel, which refers to the complex twisting and interlacing of enamel rods at the cusp tips and incisal edges. Enamel spindles are extensions of dentinal tubules into enamel, while incremental lines of Retzius and woven incremental lines represent growth patterns in enamel but do not describe this intertwining.