iich of the following statements describe a quantum computer?

A$.$ A quantum computer is a computer that uses the structure of physical gadgets with sensors$,$ software, and other technologies to connect and swap data with other devices and systems over the internet.

B$.$ A quantum computer is a computer with a chip on its motherboard that provides cryptographic services, includes a true random number generator, and supports fully asymmetric encryption.

C$.$ A quantum computer is a computer that relies on qubits that can be both $0$ and $1$ at the same time.

D$.$ A quantum computer uses encrypted hardware until the correct password is provided and all data copied to the computer is automatically encrypted.