Which of the Following Best Characterizes the Viewpoint of Early-20th-Century

Which of the following best characterizes the viewpoint of early-20th-century psychologists on the ability to study conscious experience scientifically?

A) They were convinced that conscious experience could easily be studied.
B) They were convinced that conscious experience could be studied, but only if introspection was used.
C) They were convinced that conscious experience could be studied but only if a behaviorist approach was used.
D) They were convinced that conscious experience could not be scientifically studied.