You want to know how many miles Harriet went. Which situation about her exercise best represents the inequality 15x + 7 > 52? A. Harriet exercised more than 52 minutes. She stretched to warm up, ran, and stretched to cool down. She spent 15 minutes stretching and 7 minutes running each mile. B. Harriet exercised for at least 52 minutes. She stretched to warm up, walked, and stretched to cool down. She spent 7 minutes stretching and 15 minutes walking each mile. C. Harriet exercised for at least 52 minutes. She stretched to warm up, ran, and stretched to cool down. She spent 15 minutes stretching and 7 minutes running each mile. D. Harriet exercised more than 52 minutes. She stretched to warm up, walked, and stretched to cool down. She spent 7 minutes stretching and 15 minutes walking each mile.