What is the expanded form of this number?

18.029

a (1×10)+(8×1)+(2×110)+(9×11,000)

b (1×10)+(8×1)+(2×1100)+(9×11,000)

c (1×10)+(8×1)+(2×1100)+(9×1100)

d (1×10)+(8×1)+(2×110)+(9×1100)