what do scientists use to divide the geologic time scale? (a) major divisions in the fossil. (b) records major divisions in the sedimentary rock layers. (c) evidence for catastrophic events in earth's history. (d) major changes in mineral deposits in the rock layers.

How does an island of development promote economic development? a. islands of development contribute to mining industries because they continue to form mountains. b. islands of development have been ruled by dictators since the 1950s as part of an economicexperiment. c. islands of development promote international development by creating new islands. d. islands of development stimulate job creation in underdeveloped nations. select the best answer from the choices provided.0 000