A, B, C, D, P, and Q are points in a uniform electric field. The potentials at these points are `V(A) = 2 V. V(P) = V( B) = V(D) = 5 V`, and `V(C) = 8 V`. Find the electric field at P.
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A. `10 "Vm"^(-1)` along PQ
B. `15 sqrt(2) "Vm"^(-1)` along PA
C. `5 "Vm"^(-1)` along PC
D. `5 "Vm"^(-1)` along PA