The Willowbrook studies tried to justify the use of human subjects by doing which of the following?a. Deliberately infecting children with hepatitisb. Obtaining oral consent without documenting it and claiming that it was a standard of care to perform more dangerous procedures without written consentc. Leading volunteers to believe that the procedures were free special medical cared. Claiming the facility was overcrowded, giving parents no choice but to give permission for their child to participate in the study