A first-year student at a college is required to choose one of the 2 Math subjects (M1,M2) and one of the 4 General Education subjects (G1, G2, G3, G4) being offered. Select a correct tree diagram that shows all the possible choices for choosing a Math and General Education subject.

Math Subjects: M1, M2

General Education Subjects: G1, G2, G3, G4

Tree Diagram:
- M1
- G1
- G2
- G3
- G4
- M2
- G1
- G2
- G3
- G4