After completing the initial diagnostics and assigning system resources, the startup bios program checks for information about secondary storage devices that might contain the os. the list of devices and the order in which they should be checked can be found and arranged in the cmos setup utility, and this option is commonly referred to as:
a. boot recordb. master boot record (mbr)c. partition tabled. boot sequence

boot sequence

Explanation:

According to my research on information technology, I can say that based on the information provided within the question this is commonly referred to as the boot sequence. Like mentioned in the question this is the order in which the BIOS checks each drive in the sequence until an OS is found and then proceeds to launch the first drive containing the OS. If the drive contains more than one OS it will then ask you which OS you would like to enter.

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