How do the substitution effect and income effect explain the law of demand when the price of a good increases?

Consumers buy the same amount of the good because substitution and income effects cancel each other out.

Consumers buy less of the good because they substitute it with cheaper alternatives and their real income decreases.

Consumers buy more of the good because they substitute it with more expensive alternatives and their real income increases.

Consumers buy less of the good because they substitute it with more expensive alternatives and their real income increases.