Which of the following statements is accurate? a. cities are attractive because of job opportunities, but rapid growth causes the development of slums. c. farmers are primarily men while herding is left to the women. b. cities are unattractive because there are no jobs available and a better living can be earned through farming. d. all of the above

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed