# Middle term in the expansion of $(a^3+ba)^{28}$ is ______

$\begin{array}{1 1}(A)\;28C_{14}a^{56}b^{14}\\(B)\;28C_{14}\\(C)\;28C_{14}a^{56}\\(D)\;28C_{14} b^{14}\end{array}$

Toolbox:
• If n is even then the total number of terms in the expansion of $(a+b)^n$ is n+1