Identify the example with correct use of 'both' and 'and.'

The correct answer demonstrates the appropriate structure for using "both" and "and" in a sentence. In option A, the phrase "both read and understand" presents two parallel actions that share a common experience: the difficulty of the scientific report. This structure allows for a clear and concise connection between "both" elements, indicating that both actions are part of the same sentiment regarding the report.

In contrast, the other options struggle with maintaining a smooth parallel structure. For instance, they either do not follow the correct construction guidelines or create awkward phrasings. The proper use of "both" should precede the two items being joined, followed directly by "and" to connect them seamlessly, as seen in the correct choice. Thus, option A adheres to this grammatical principle effectively.