Look back at problem FE$-$II$-2-1,$ the symbolization used in FE$-$II$-1,$ and pick the best option below:

This is not a valid argument so we can't use it in science.

This is a valid argument formally speaking but we can't use it in science

This is a valid argument and can be used in science to falsify, based on the lack of observation of Vulcan, the classical theory of gravity.

This is a valid argument and can be used to confirm the General Theory of Relativity.

This argument falsifies classical theory of gravity and can confirm General Theory of Relativity ONLY IF we add to it assumption FE$-$II$-1-5.$