Identify the Letter of the Choice That Best Matches the Phrase

Identify the letter of the choice that best matches the phrase or definition.
-A design that expands or contracts in proportion to the size of the user's viewport

A) portrait
B) fluid
C) elastic
D) relative
E) nested
F) @page
G) landscape
H) liquid
I) size
J) fixed-width
K) print style
L) hybrid