What is the output of the margin value when used within this context, assuming that its containing element is larger than 800px?

.example {
  width: 800px;
  margin: 0 auto;
}

1.  The example element will have 0 margin space around the whole element. The auto value will center align the element horizontally and vertically within its container.

2.  The example element will have 0 margin space on the left and right. It will be sized automatically on the top and bottom, which will center align the element within its container.

3.  The example element will have 0 margin space on the top and bottom. The margin will be sized automatically on the left and right, which may center align the element within its container.

4.  The margin value is invalid because its missing a unit measurement after the 0.

Correct Answer:

•  The example element will have 0 margin space on the top and bottom. The margin will be sized automatically on the left and right, which may center align the element within its container.