The correct answer is A) Both the upper and lower legislative houses must approve a proposed law.
The statement that describes a step that is required in both federal and state law-making is "Both the upper and lower legislative houses must approve a proposed law."
Congress in the states of the US is formed by two chambers, that have different names, depending on the state. The only exception is the state of Nebraska. Despite the specific name they receive, they can be identified as the upper chamber and the lower chamber, and they have similar functions as the House of Representatives in the US Congress and the Senate.