What type of questions cannot be solved by scientific method?
a. questions about ethics
b. questions about extinction species
c. questions about the deep ocean
d. questions about the past

The correct answer is option A

Scientific method is used to answer the question that is based on science. These questions can be answered by the help of various set of protocols which has to be followed one after another.  

The protocols has to be followed in a proper manner such as aim, hypothesis, procedure, result and conclusion.

The questions related to ethics does not requires proper experiment. These questions can be answered based on person's opinion.

C

Explanation:

As i don't know why the other person put their answer as A you can but they might be racists but anyways the deep ocean we don't have advance enough tech to deal with the pressure per square inch and people or machines would be destroyed or kills before even reaching the bottom.