After His Initial Discoveries and for the Rest of His

After his initial discoveries and for the rest of his life, Coley tried to develop a ______ extract that when injected under the skin would stimulate a patient's immune system to destroy their malignancy. His approach called ________ worked against some uncommon__________.

A) bacterial, Coley's toxin, soft-tissue carcinomas
B) bacterial, Coley's solution, soft-tissue sarcomas
C) viral, Coley's toxin, soft-tissue sarcomas
D) bacterial, Coley's toxin, soft-tissue sarcomas
E) human cytoplasmic, Coley's cure, soft-tissue hepatomas