Q. Which of the following finds row sums for each level of a grouping variable? (A) as.numeric(x) (B) rowsum(x, group, reorder = TRUE, ...) (C) as.order(x) (D) colSums (x, na.rm = FALSE, dims = 1) 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) rowsum(x, group, reorder = TRUE, ...)