The diagram illustrates the resultant $R$ produced by two forces of $3.0\,\text{N}$ and $4.0\,\text{N}$ applied at one point. The angle between the $3.0\,\text{N}$ force and the $4.0\,\text{N}$ force may take any value between $0^{\circ}$ and $90^{\circ}$. Which value of $R$ cannot occur?
- A$4.0\,\text{N}$
- B$5.0\,\text{N}$
- C$6.0\,\text{N}$
- D$7.0\,\text{N}$