2023 Cayley Problem 4

Lucy tracked the number of cardinals and the number of blue jays that she saw each day for three days. The graph below summarizes the birds that she saw.

How many more cardinals than blue jays did she see over the three days?

\textbf{(A)}\ 7\quad \textbf{(B)}\ 3\quad \textbf{(C)}\ 6\quad \textbf{(D)}\ 8\quad \textbf{(E)}\ 1

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Cayley contests here.