Question: To make the font size of an element one size smaller than the font size of the element's container, which style property would you apply?

1. `font-size: reduce;`
2. `font-size: 8px;`
3. `font-size: -1em;`
4. `font-size: smaller;`

Answer: The correct answer of the above question is Option D:`font-size: smaller;`