The Correct Order of Firing to Create Sintered Alloy Composites

The correct order of firing to create sintered alloy composites is firing 1. of a ceramic that mediates ceramic-alloy bonding.
2) to create a spongy coping of high-noble metals.
3) of a lower fusing alloy that is absorbed by capillary action.

A) 1, 2, 3
B) 2, 1, 3
C) 3, 1, 2
D) 1, 3, 2
E) 2, 3, 1