D

The magnetic flux density, also known as magnetic induction, is commonly represented by the symbol B. The unit of magnetic flux density can be expressed in several equivalent ways:
1. The SI unit of magnetic flux density is the Tesla (T), which is defined as one weber per square meter (Wb/m²).
2. One Tesla is also equivalent to Newton per ampere-meter (N/(A\cdot m)), as it describes the force exerted on a charged particle moving in a magnetic field.
Since all options describe valid units for magnetic flux density, the correct answer is therefore D: All of the above.