You can use the Format Painter button to copy text ____.

To specify that an element contains both text and child elements, add the ____ attribute to the of an element.

A. double B. multiple C. aggregate D. mixed

The executions of transactions are strict if read and write operations on an object are delayed until all transactions that previously wrote that object have either committed or aborted. Explain how the locking rules ensure strict executions.

What will be an ideal response?