Q. In R, how is a matrix initialized with values 1 to 9 arranged in three rows?

• (A) matrix(1:9, nrow = 3, ncol = 3)
• (B) matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), 3, 3)
• (C) matrix(1:9, rows = 3, cols = 3)
• (D) mat(1:9, 3, 3)