Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Which of the following statements about a heat map is incorrect?
Option A:It is a useful tool for visualizing textual data.
Option B:It is suitable for visualizing the degree of correlation among different variables.
Option C:It is commonly used in displaying frequency distributions.

Answer: A