# data[].attributes.body
A line plot is the most appropriate because it shows how much students had that number of A's.

# data[].attributes.body
The average student has 3 A's.

# data[].attributes.headline
The most appropriate measure of center is...

# data[].attributes.subject
The most appropriate measure of center is...

# data[].attributes.body
Mode because it shows the most common number of A's.