The correct answer is B. Sequential.
A cassette tape is a sequential access device. This means that the data on the tape is stored in a linear fashion, and the only way to access a particular piece of data is to start at the beginning of the tape and read through the data until you reach the desired location.
A direct access device, on the other hand, allows you to access any piece of data on the device without having to read through all of the data that comes before it. This is possible because direct access devices store data in a non-linear fashion, such as on a hard drive or solid-state drive.
Random access is a type of access that allows you to access any piece of data on a device without having to follow a specific order. This is possible because random access devices store data in a non-linear fashion, such as on a hard drive or solid-state drive.
Therefore, the correct answer is B. Sequential.