In every answer option, there is a word (than), which indicates to make comparison to each other in a specific sentence.
A. a much larger proportion of anthropologists to study tribal land holding patterns than does any government.
The intended meaning and grammar structure are perfectly fine.
B. a much larger proportion of anthropologists to study tribal land holding patterns than any other government does.
The comparison between Mining Corporation and other government does not make sense.
C. much larger proportions of anthropologists to study tribal land holding patterns than has any government.
So what? It is a general statement. There is no proper comparison here.
D. a much larger proportion of anthropologists to study tribal land holding patterns than any government.
So what? It is a general statement. There is no proper comparison here.
E. a much larger proportion of anthropologists to study tribal land holding patterns than any other government.
The comparison between Mining Corporation and other government does not make sense.