Under prevailing Rule 26 of the Federal Rules of Civil Procedure, an expert report
A.) must contain an expert's draft report and related disclosures.
B.) must contain facts and data considered by the witness in forming the opinions.
C.) must contain a complete statement of all opinions to be expressed even if the basis and reason for them are absent.
D.) is expected to be logically precise and short in length.

Under Rule 26 of the Federal Rules of Civil Procedure, an expert report must contain a complete statement of all opinions to be expressed, the facts and data considered in forming those opinions, any exhibits supporting the opinions, the expert's qualifications, a list of previous cases testified in, and a statement of compensation

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. This report aims to provide notice to opposing counsel before deposition on how the expert will testify and can lead to exclusion if too vague or lacking supporting basis for conclusions

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. The report must be prepared and signed by the expert witness and is crucial for ensuring experts testify within the scope of their original report

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. Additionally, Rule 26 outlines the duty to disclose information about expert witnesses and specifies requirements for written reports from retained or specially employed experts providing testimony in a case

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