In the Devonian, how many TOTAL occurrences of Placodermiomorphi are in the Hunsrck Slate in Germany? (The Hunsrck Slate contains some of the most well-preserved Paleozoic fossils, especially of organisms that are usually hard to preserve such as jellyfish, brittle stars, and the soft parts of animal tissue.) Note: If you can not view this information on the Paleobiology Database site, you will need to see these details of Placodermiomorphi occurrence site 1 and site 2. Select one: a. -200 occurrences b. 0 occurrences c. -20 occurrences d. -70 occurrences