Some studies have shown that peppermint odor increases people’s mental sharpness, especially when they solve math problems. which best describes how this could be a valid scientific claim?
if it is tested in a controlled setting with repeated results
if the test is published on wikipedia
if the scientist was previously peer reviewed
if the math problems are easy problems

The first statement illustrates a valid scientific claim.

Explanation:

A scientific claim refers to a condition, which comprises the outcomes that are achieved after the execution of experimental procedure and reasoning on the basis of the grounds of a specific natural event or phenomenon. The relevant evidence or fact supports the claim. The outcomes are only regarded as effective when the recurrent trials using a similar methodology are performed under controlled circumstances.

If it is tested in a controlled setting with repeated results

Explanation:

This is how a hypothesis is accurately tested and because it is in a controlled setting, many more people can also recreate the same experiment

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

a chain link fence because there so tiny even my albino donkey can't get out