What artifacts did Germany have to return?

a bible and whip

Explanation: After more than a century, a bible and whip belonging to folk hero Hendrik Witbooi has been returned to his native Namibia. A Linden Museum expert tells DW how this restitution decision could set a new precedent.

the answers is b.   environments.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.