The correct answer is B. Random access memory (RAM).
RAM is a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is typically used to store data and instructions that the computer is actively using.
Sequential access memory (SAM) is a type of computer memory that can only be accessed in a sequential order. This means that the computer must access all of the data before it can reach the data that it is looking for. SAM is typically used to store data that is not frequently accessed, such as historical data or data that is used for backup purposes.
Secondary memory is a type of computer memory that is not directly accessible by the CPU. Secondary memory is typically used to store data that is not currently being used by the CPU, such as programs, files, and data that is being backed up.
Mass storage is a type of computer storage that is used to store large amounts of data. Mass storage devices typically include hard drives, optical drives, and solid-state drives.