Respuesta :
The cheapest route should be c) ABCDA, $960
calculation of cheapest route:
Starting at A: Options are B = 220, C = 240, D = 310
Now
Choose B since it has the smallest value.
Now
From B: Options are C = 200, D = 210
Choose C since it has the smallest value.
From C: There is only one option i.e. D = 230 here we cannot choose A since it was our beginning point.
From D: We touched all of the vertices due to this, return to the starting point, A = 310
So,
A → B → C → D → A --> 220 + 200 + 230 + 310 = 960
learn more about the vertex here:https://brainly.com/question/2765283