A ________ is a category of information such as the date or page number that can be added to a document

How would you fix this problem?

Consider the problem of finding the K nearest neighbors of a data object. A
programmer designs Algorithm 2.1 for this task.

All application programs access the hardware through the __________ following rules imposed by the __________.

a. interface/operating system b. operating system/operating system c. operating system/interface d. interface/interface