Why would a political scientist wish to consult multiple sources of info on a topic

Which of these statements best describes the ambiguity in this excerpt

Which of the following scenarios illustrates the cultural impact of expanded regional trade for postclassical civilizations? o a. the byzantine empire rises in place of the roman empire. o b. an islamic scholar attends a university in his hometown. o c. internal disputes weaken a large african empire. o d. an arabian sultan wears a robe made from chinese silk.

Which of the following equations represents the right chemical process that occurs i. photosynthesis