From the list below, select four situations in which casting is the preferred fabrication technique. 1. When the processing would be very precise
2. For large pieces and/or complicated shapes
3. When mechanical strength is not an important consideration
4. For metals having high melting temperatures
5. For alloys having low ductilities
6. When it is the most economical fabrication technique

a. (1), (3), (4), (5)
b. (1), (2), (4), (5)
c. (1), (2), (4), (6)
d. (2), (3), (5), (6)
e. (2), (3), (4), (6)