Trees and spanning trees

Vertices in listed order: [B | D | C | E | G]. Full edge list: C–D, D–B, E–B, G–B, B–C

Vertices in listed order: [B | D | C | E | G]. Full edge list: C–D, D–B, E–B

Vertices in listed order: [B | D | C | E | G]. Full edge list: C–D, D–B, E–B, G–B

Vertices in listed order: [B | D | C | E | G]. Full edge list: C–D, D–B, E–B, G–B, D–B