The correct answer is C) a pie chart.
The type of graph that would best shows the percentage of total sales belonging to Ford cars/trucks is a pie chart.
A pie chart is a very useful tool. It is a circular diagram that looks like a pie. It is divided into slices. The circle represents the whole. The slices represent a proportion or a percentage. The size of the slice represents a portion of that whole or 100%. The circle or pie chart is used when making presentations as a visual aid to represent percentages or tendencies.