Which of the following statements is correct concerning GPS signals and codes?

The $\frac{C}{A}$ and $P$ codes are both transmitted on both $L1$ and $L2.$

The C$/$A code is transmitted on L$1,$ and the P code is transmitted on L$1$ and L$2.$

The C$/$A code is transmitted on L$1,$ and L$2$ while the P code is transmitted on L$2.$

The C$/$A code is transmitted on L$1,$ and the P code is transmitted on L$2.$