"claim that the existence of god can neither be proved nor disproved, and thus that we should neither accept nor reject the proposition"

Agnostics.

Explanation:

Agnostics are the person who does not believe in the existence of God. They hold the belief that the existence of God cannot be proven or disprove. They are not atheists who deny the existence of God. Agnostics neither say yes that they believe in the existence of God nor says no about the same. They, in a way, withhold their opinions on the same.

The term agnostics was introduced by Thomas H. Huxley. Huxley was a philosopher, speaker, and biologist of the 19th century.

So, the correct answer is agnostics.

b) to encourage free trade

answer; /// i believe the correct answer is general act charters;