Answer: A

This question involves the issue of banned signs. Article 12 of the Trademark Law stipulates that when applying for a registered trademark with a three-dimensional mark, a shape that is solely caused by the nature of the goods themselves, a shape of the goods that is necessary to obtain technical effects, or a shape that makes the goods of substantial value shall not be registered. But it can be used as a trademark, so A is correct. According to Article 10 of the Trademark Law, signs that are identical or similar to the country name, national flag, national emblem, national anthem, military flag, military emblem, military anthem, medals, etc. of the People's Republic of China shall not be used as trademarks. Therefore, B is wrong. Symbols that are the same as or similar to the names and symbols of "Red Cross" and "Red Crescent" shall not be used as trademarks, so C is wrong. Place names of administrative divisions at or above the county level or foreign place names known to the public may not be used as trademarks, so D is wrong. The correct option for this question is A.