Which of these is a reason a scientist might repeat an experiment?

A scientist might repeat an experiment B) to check their own work in a previous experiment.

The results of an experiment must be reproducible. It is better for the scientists to do this themselves rather than have other scientists show they were wrong.

In chemistry, a salt is a solid chemical compound consisting of an ionic assembly of cations and anions. Salts are composed of related numbers of cations and anions so that the product is electrically neutral. These component ions can be inorganic, such as chloride, or organic, such as acetate; and can be monatomic, such as fluoride or polyatomic, such as sulfate.