In Excel Online, column charts should be used to represent a single series of data with associated labels

How can a user be assured that a file downloaded from a vendor's Web site is free from malicious code?

A. Check for system compatibility. B. Read reviews about the product. C. Check the file's signature and hash calculation. D. Check the file size.

If you have a 1000-element balanced binary search tree, what is the maximum number of comparisons that may be needed to find an element in the tree?

a. 500 b. 20 c. 10 d. 8