[Solved] A user needs to send sensitive information to a colleague using PKI. Which of the following concepts apply when a sender encrypts the message hash with the sender's private key? (Select TWO) A) Non-repudiation B) Email content encryption C) Steganography D) Transport security E) Message integrity Optical Microscope: An instrument that uses visible light and lenses to magnify objects, allowing for the observation of small details that cannot be seen by the naked eye. Focus Control: The adjustment or regulation of the clarity and sharpness of an image in photography or optics. Sterilization: The destruction of all microorganisms, including bacterial spores, by specific means. Organisms: Living entities that can act or function independently, ranging from single-celled bacteria to complex multicellular forms like animals and humans.