What would be the BEST way to represent this data that illustrates change in average temperature over time? A) a data table of all data collected for the five years B) a bar graph comparing each year's average temperature C) a map of the state with the average temperatures written at each site D) a line graph showing the average change in temperature over five years

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.