The area west of Springfield was a smelting factory from 1879 until 1962, when it was purchased by Manfred Otterbein, the noted philanthropist and animal lover,
who established a wildlife refuge on the property and used one of the existing buildings as a rare bird sanctuary.A) who established a wildlife refuge on the property and used one of the existing buildings as
-- Correct. "Who" correctly refers to Manfred Otterbein, and "established..." / "used..." are pareallel.
B) who, establishing a wildlife refuge on the property, used one of the existing buildings like
-- Incorrect. Should be "used... as..." not "used... like..."
C) who, when he had established a wildlife refuge on the property, used one of the existing buildings like
-- Incorrect. Should be "used... as..." not "used... like..."
D) who had established a wildlife refuge on the property, using one of the existing buildings to be
-- Incorrect. "had established" refers to a time before the purchase, which doesn't make sense.
E) establishing a wildlife refuge on the property and using one of the existing buildings as
-- Incorrect. The previous clause has no noun for the verb-ing modifier to modify