Scenario 2: C/O ratio and [(C+O)/H] distribution for planets with mass and final orbital distance similar to values seen for WASP-77Ab, either formed in a disk with solar composition (blue) and a composition similar to WASP-77A (purple). Observed C/O ratio and [(C+O)/H] of WASP-77Ab and their contours are shown in red. These planets end their migration somewhere beyond the current position of WASP-77Ab. The carbon values for these simulations varies between 0 and 1.