The four wire loops shpwn figure have vertical edge lengths of either `L,2L` or `3L`. They will move with the same speed into a region of uniform magnetic field `vec(B)` directed out of the oage. Rank them according to the maximum magnitude of the induced emf greatest to least.
A. `1` and `2` tie, then `3` and `4` tie
B. `3` and `4` tie, then `1` and `2` tie
C. `4,3,2,1`
D. `4` then, `2` and `3` tie and then `1`