Phillipe is comparing three primary sources about a major historical event a natural disaster that nearly destroyed an entire small town. he is especially interested in what people of that era thought of disaster recovery services. what is he likely to find as he compares these sources?
a. it will be easy to tell which source is most reliable and valid
b. the different sources will all know each other very well
c. the sources will not know much about the topic he is interested in
d. the different sources have different viewpoints on the same events