Identify the property that justifies each step asked about in the answer area below.
\text{Line 1: }\phantom{=}
Line 1: =
\,\,c(bd)
c(bd)
\text{Line 2: }\phantom{=}
Line 2: =
\,\,(cb)d
(cb)d
\text{Line 3: }\phantom{=}
Line 3: =
\,\,(bc)d
(bc)d

Line 1 to Line 2:
Line 2 to Line 3: