What primary purpose does a citation serve in a work of history

a. it allows readers to evaluate a source for themselves
b. it acts as an official stamp of accuracy for the historian
c. it confirms for the reader that an interpretation is true
d. it reveals important information about the historian

Ineed to have answers for numbers 2-4 reply to this question

•political and economic system greatly influenced by the ideas karl marx • factors of production owned by the government • production and distribution of goods controlled by central planners what form of government is described above

Interest groups representing businesses and investors are often among the most successful lobbying groups for all of the following reasons, except a. such groups have the financial resources to mount sustained campaigns on their own behalf b. these groups' members contribute heavily to many legislators' campaigns and in so doing gain greater access to legislators c. these groups have often been in existence for decades, allowing them to both master the legislative system and develop close ties with legislators d. the members of these groups make up the majority of voters in many districts