A sufficient condition refers to a relationship between two sentences. If one sentence is true, then the other sentence must be true, and the previous sentence is said to be a sufficient condition for the next sentence. Which of the following two sentences, the previous sentence is a sufficient condition for the next sentence? ['There is a number that is divisible by 4 and there is a number that is divisible by 2.', 'The earth is orbiting the sun, and the moon is a satellite of the earth.', "Cao Cao is Cao Zhi's father, Cao Yu and Cao Zhi are brothers.", 'Jiangsu is to the east of Anhui and Shanghai is an international metropolis.']