Answer:
The correct answer is c. bar graph.
Step-by-step explanation:
The best visual tool to show the amount of product formed under different reaction conditions is the bar graph. This tool is also called the bar diagram or the bar chart. The bar graph uses bars to make comparisons among different categories. It can be presented horizontally or vertically. This tool shows that the longer the bar, the greater its value. Bar graphs mainly consist of two axes.