Which of the following describes the structure of the group of units U(105)U(105)U(105)?
C2×C4×C6C_2 \times C_4 \times C_6C2×C4×C6
C2×C2×C4×C3C_2 \times C_2 \times C_4 \times C_3C2×C2×C4×C3
C2×C4×C2×C6C_2 \times C_4 \times C_2 \times C_6C2×C4×C2×C6
C4×C2×C6C_4 \times C_2 \times C_6C4×C2×C6