Question 2What is the value of the expression $(a-b)(a+b-c)+(b-c)(b+c-a)+(c-a)(c+a-b)$?$0$$a^2+b^2+c^2$$ab+bc+ca$$a^2+b^2+c^2-ab-bc-ca$$a^2+b^2+c^2+ab+bc+ca$