(-3c^4-5c^2-7c)+(4c^4+8c^3+2c^2)

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.

answergeosphere;

answerblank(1); khirbat al-mafjar,blank(2); ostracon.blank(3); //hisham,blank(4),; //lion; blank(5); gazelle;