A. Using technical knowledge and experience,
clay is manipulated by ceramic artists with an endless amount of creative sculpting and firing methods.......................................
using technical knowledge.......should modify artists not the clay
B. Using technical knowledge and experience, ceramic artists manipulate clay with an endless amount of creative sculpting
as well as firing methods.........................'and' is fine instead of
as well asC. Using technical knowledge and experience, ceramic artists manipulate clay with an endless amount of creative sculpting and firing methods.....................looks fine
D. Ceramic artists,
using technical knowledge as well as experience, manipulate clay with an endless amount of creative sculpting and firing methods..............................This becomes a non-essential modifier. which is not correct IMO.
E.
Using technical knowledge, experience and an endless amount of creative sculpting and firing methods, clay is manipulated by ceramic artists...................................Meaning issue.
IMO OA should be C