The number of text messages that Reza sent each day so far in this billing cycle is shown on the dot plot.

A number line going from 1 to 13. 2 dots are above 2. 1 dot is above 3. 3 dots are above 6. 2 dots are above 7. 3 dots are above 8. 1 dot is above 11. 2 dots are above 12.
Which statement must be true according to the dot plot?

a-The data is symmetric and shows that he typically sent about 6 to 8 text messages per day.
b-The data is symmetric and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts.
c-The data is skewed and shows that he typically sent about 6 to 8 text messages per day.
d-The data is skewed and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts