1. The problem asks about characteristics of Upper Paleolithic technology. 2. The options given are: all of these, greater symmetry, greater geographic variability, use of ivory, antler and shell. 3. Upper Paleolithic technology is known for increased sophistication in tool-making, including greater symmetry in tools, wider geographic variability in styles and materials, and the use of diverse materials such as ivory, antler, and shell. 4. Therefore, the correct answer is "all of these" because all listed features are true of Upper Paleolithic technology.