Х What is the Multiple Source Test? O A. checking to make sure that information can be found in more than one place O B. a fact checking software that tests information found on the Internet O C. an amendment that states that all information must be in multiple locations O D. a test that provides more than one answer possibility​

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Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

To move a file or folder in microsoft windows, you can click and hold down the left mouse button while moving your mouse pointer to the location you want the file or folder to be, which is also known as.