In syntax of linear model lm(formula,data,..), data refers to . . . . . . . .

The correct answer is: A. Matrix

In the syntax of linear model lm(formula,data,..), data refers to a matrix. A

The other options are incorrect because:

• A vector is a one-dimensional array of
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  numbers, symbols, or expressions.
• An array is a two-dimensional array of numbers, symbols, or expressions.
• A list is a collection of items that can be of any type.