Final answer:
Measure A is more likely to become law as it received a higher percentage of 'Yes' votes compared to Measure B.
Step-by-step explanation:
To determine which measure will become law, we need to compare the number of votes each measure received relative to the total number of votes cast in the election. Let's calculate the percentages of 'Yes' votes for each measure:
Measure A: 207,000 / 1,000,000 = 20.7%
Measure B: 171,000 / 1,000,000 = 17.1%
Based on these percentages, Measure A received a higher percentage of 'Yes' votes compared to Measure B. Therefore, Measure A is more likely to become law.