Concept:
Different clay bodies require different firing temperatures depending on their composition and vitrification properties.
•
Step 1:
Porcelain requires very high firing temperatures generally between:
\[
1200^\circ C - 1400^\circ C
\]
Thus:
\[
B \text{ is correct}
\]
•
Step 2:
Stoneware also requires high-temperature firing for vitrification.
Thus:
\[
D \text{ is correct}
\]
•
Step 3:
Raku, Terracotta, and Earthenware are generally low-temperature firing bodies.
\[
\boxed{\text{(4) B and D Only}}
\]