The dot plots below show the scores for a group of students for two rounds of a quiz:
Which of the following inferences can be made using the dot plots? (5 points)
a
The range of round 2 is greater than the round 1 range.
b
Round 2 scores are higher than round 1 scores.
c
Round 1 scores are lower than round 2 scores.
d
There is no overlap between the data.