medium10 pts · first answer countscss-positioningdebugging

position: sticky does not stick

A header has position: sticky; top: 0, but it scrolls away with the page. Its wrapper has overflow: hidden. What is the cause?

A.The overflow: hidden wrapper becomes the scroll container the header sticks within, and that wrapper never scrollsB.Sticky elements only work when they also have a z-index valueC.Sticky positioning requires the parent to use display: flexD.Sticky elements must be direct children of the body element

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