Which of the Following Best Defines How Rems Are Used

Multiple Choice

Which of the following best defines how rems are used for flexible font sizing.

A) A rem gives a maximum and minimum pixel size for headings and context fonts.
B) Compression is used to reduce or expand font size to match the user's screen.
C) Font size is determined by the user's browser settings, which override the CSS-specified sizes.
D) The font size specified in the HTML document's top-level heading becomes the standard.