Restriction-modification (RM) systems are important mechanisms for protecting bacteria from acquisition of foreign DNA. Which of the following are characteristics of RM systems?A. RM systems non-specifically methylate host DNAB. DNA from a donor with the same RM system will be accepted by a recipientC. RM systems cleave DNA specificallyD. DNA from a donor with a different RM system will be accepted by a recipientE. RM systems retain molecular memory of prior foreign DNA exposure