An expert witness, who has an advanced degree in engineering, is testifying at a jury trial to the possible causes for the failure of an enclosed pedestrian bridge in a shopping mall. Which of the following data, if relied on by the expert witness in forming his opinion, is admissible on direct examination as substantive evidence?
A) Statements told to him by witnesses to the collapse, as long as such statements are reasonably relied on by experts in his field. B) Statements that he reads from a text on structural engineering that he has testified are authoritative.
C) Testimony regarding the repair of the bridge one week after the collapse, indicating that it is now equipped with special safety features that were not installed prior to the collapse.
D) Statements made to him by a former maintenance employee of the shopping mall indicating that the management knew the bridge needed repairs but delayed doing so because the busy holiday season was approaching.