Q: Fact 1: Most invertebrates have a more complex nervous system. Fact 2: All complex living creatures, are organized by a nervous system . Given the two facts above, most invertebrates are what?

Select from: 1). microorganisms 2). extinct creatures 3). remains of prehistoric life 4). more abundant 5). dying species 6). complex living creatures 7). members of their own species 8). ruined creatures
A:
6).