Which statement best supports the inference
that most of earth’s present-day land surfaces
have, at one time, been covered by water?
(1) volcanic eruptions contain large amounts of
water vapor.
(2) coral reefs formed, in the past, along the
edges of many continents.
(3) seafloor spreading has pulled landmasses
apart and pushed them together.
(4) sedimentary bedrock of marine origin covers
large areas of earth’s continents.