COMPTIA A+ Practice Exam

EFS stands for Encrypting File System. The reason why options A, C, and D are incorrect is that they do not match the actual acronym for EFS. Option A changes "System" to "Service," option C changes "File" to "Encoded," and option D changes "Encrypting" to "Encrypted" and adds the word "Format." It's important to pay attention to the details in acronyms to choose the correct answer.