Common Redundant Usages to Avoid: Directions: Each of the following sentences is divided into four parts: (A), (B), (C), and (D). One of these parts contains a redundant expression. Identify the part that contains the error. If there is no error, choose (D) as your answer. Before teaching complex equations, the professor first covered the basic fundamentals of linear algebra using real-world illustrations.

Directions: Each of the following sentences is divided into four parts: (A), (B), (C), and (D). One of these parts contains a redundant expression. Identify the part that contains the error. If there is no error, choose (D) as your answer. Before teaching complex equations, the professor first covered the basic fundamentals of linear algebra using real-world illustrations.