The Pie Chart is not suitable.
Why do you think it's not appropriate?
If the numbers used in the Pie Chart are not perfect, the numbers would be rounded off, causing the degree to be not perfect, producing an inaccurate diagram, hence I think it is not appropriate.
What makes you think the 3 remaining graphs are appropriate?
The numbers are not rounded off as one whole is not a weird number like 360, which makes it hard to represent.