问题如下：
Steele performs exploratory data analysis. To assist in feature selection, she wants to create a visualization that shows the most informative words in the dataset based on their term frequency (TF) values.
Given her objective, the visualization that Steele should create in the exploratory data analysis step is a:
选项：
A.scatter plot
word cloud.
document term matrix.
解释：
B is correct. Steele wants to create a visualization that shows the most informative words in the dataset based on their term frequency (TF, the ratio of the number of times a given token occurs in the dataset to the total number of tokens in the dataset) values. A word cloud is a common visualization when working with text data as it can be made to visualize the most informative words and their TF values. The most commonly occurring words in the dataset can be shown by varying font size, and color is used to add more dimensions, such as frequency and length of words.
C 为什么不对？
