Combine the following sentences, using perfect gerunds

He risked his own life to rescue the little boy. He was really admired for that.

A. He was really admired for having been risked his own life to rescue the boy

B. He was really admired to have risked his own life to rescue the boy

C. He was really admired on having risked his own life to rescue the boy

D. He was really admired for having risked his own life to rescue the boy