Which of the following historians has organized her study of the past based on the category "period"?
a. a historian writes an extensive text on the important contributions of southeast asian countries
b. a historian studies each of the major world powers between the years 100 bce and 100 bc
c. a historian creates a graph of the economic strength of various empires throughout history.
d. a historian assesses a number of primary source documents to create a new secondary source.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

judaism, christianity and islam, are all abrahamic religions and therefore have in common the hebrew idea of a single god which is the source of all morality. the idea of the covenant is only related to judaism, while dharma is a concept of indian religions and the four noble truths are basic principles of buddhism.

what's the passage bud?