Which of the Following Are Considered Basic Processes, as Opposed

Multiple Choice

Which of the following are considered basic processes, as opposed to secondary processes (four correct answers) :

A) annealing
B) anodizing
C) drilling
D) electroplating
E) forward hot extrusion to produce aluminum bar stock
F) impression die forging
G) rolling of sheet steel
H) sand casting
I) sheet-metal stamping
J) spot welding
K) surface grinding of hardened steel
L) tempering of martensitic steel
M) turning