There are a number of graphic presentation forms.Which would you recommend to show each of the following?Why?

a.A comparison of changes in average annual per capita income for the United States and Japan from 1995 to 2010.

b.The percentage composition of average family expenditure patterns, by the major types of expenditures, for families whose heads are under age 35 compared with families whose heads are 55 or older.

c.A comparison of the changes in charitable giving between December 31, 2006, and December 31, 2010.