参考答案

正确答案：A
解析：本题的依据句是“At first，these articles were whittled with a knife，but when pioneer craftsmen set up their primitive shops most of them were fashioned on a lathe—a machine which holds an object and rotates it while it is being shaped by a tool．”。在这里，A项的“not very sophisticated”意思为“并不复杂，是简单的”，对应原文中的“primitive(原始，简单)”。其他选择项的内容属于无关信息。