Based on the details in "Albert Schweitzer: A Life of Service and Sacrifice," Schweitzer returned to Africa alone because
O his wife Helene had died of an illness while she was in Europe.
O Helene had not recovered her strength after having tuberculosis,
he and Helene believed that their daughter should be raised in France.
o the hospital grounds in Africa had become too overgrown for Helene.

B

Explanation:

Helen had not recovered her strength after having tuberculosis. (Just look the Unit 4 test)

the sample answer on e2020

conflicting values are demonstrated between two different groups in animal farm. first, the farm animals value hard work. this is shown by them working late and working long hours at the request of the pigs. napoleon and the pigs, however, sleep late daily. furthermore, the animals value equality. this differs from the value of napoleon and the other pigs. instead of equality, they value only gaining power and maintaining their own privilege, which is demonstrated by their taking extra milk and sleeping in beds.