I would say that the answer should be "Helen's challenges with the frustration of learning to communicate".as a blind-deaf person and the excellent analogy with being shrouded in fog and not having how to determine where she was headed but love giving her the light to find her way and eventually get a degree at university.
This is false.
It is false because a scientific method is a lot more complex and has many steps which need to be fulfilled for it to be valid. Rationality and common sense are not enough for something to be scientific as sometimes something can be irrational or almost nonsensical and yet scientific.
It is (D) all responses provided
Ray and I like bird watching, but he enjoys it more than I