Resolve into factors: \[1+a+b+c+ab+bc+\]\[ca+abc\]

1.	Resolve into factors: \[1+a+b+c+ab+bc+\]\[ca+abc\]
A.	\[(1+a)(1+b)(1+c)\]
B.	\[(a+b+c+1)(a-b-c)\]
C.	\[(a+b)(b+c)(c+a)\]
D.	\[({{a}^{2}}+{{b}^{2}}+{{c}^{2}})(1-a-b-c)\]
Answer» B. \[(a+b+c+1)(a-b-c)\]

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Resolve into factors: \[1+a+b+c+ab+bc+\]\[ca+abc\]

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