After manually compiling and installing a new kernel, what has to be done regarding the initramfs?

After manually compiling and installing a new kernel, what has to be done regarding the initramfs?
A . To initramfs is independent of the kernel and should not be modified unless the hardware configuration of the machine has changed
B . Since the initramfs contains kernel modules, a new initramfs must be built for the new kernel
C . During the compilation of the Linux kernel, a new initramfs is built automatically. The new initramfs only needs to be installed
D . The system should be restarted since the initramfs reconfigures itself for the new kernel during the startup of the system

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Answer: B