Dr. Semmelweis, a physician from Austria, wanted to locate the cause of childbed

fever in his maternity wards. He suggested that the doctors in the hospital were

transferring a disease-causing substance to the pregnant mothers because they were

not washing their hands. His suggestion was a:

A. observation

B. hypothesis

C. theory

D. controlled experiment

Dr. Semmelweis, a physician from Austria, wanted to locate the cause of child-bed fever in his maternity wards. He suggested that the doctors in the hospital were transferring a disease-causing substance to the pregnant mothers because they were not washing their hands. His suggestion was a:

observation

Explanation:

Dr Semmelweis only observed what could have caused the child-bed fever since there is no migration of people from elsewhere it shows that it is only within the terrain are causing the transmission within themselves.

I would say D but not sure