Which axis shows the numerical scale as a range of numbers for the data points?

An example of a component would be:

a) a button b) a timer c) a form d) All of the above

Using the same query at different search engines often gives different search results because _____.?

A. ?each search engine may contain different webpages in its database B. ?each search engine may use different rules to evaluate search expressions C. ?both a. and b. D. ?none of the above; all search engines give the same results