Which statement be Which statement best supports the land bridge theory of early migration? Supports the land bridge theory of early migration?

Full question:

Which statement best supports the land bridge theory of early migration?

Migrants had access to boats to help them migrate.

Ice would not have kept migrants from moving into North America.

Crossing over land was more difficult than traveling by boat.

Migrants would not have needed special technology to cross the land.

Migrants would not have needed special technology to cross the land.

Explanation:

The land bridge theory(first proposed by Jules Marcou) hypothesized based on fossil evidence from scientists that people and animals crossed through a land bridge separating Serbia from Alaska during the Ice Age, the stretch of land now a stretch of water now known as the Bering Strait. This theory believes that since this happened a long time ago, some 10000-25000 years ago, there couldn't have been any technology to pull this off but the help of the environment. It is believed glaciers had frozen up water(bering strait) so that people and animals were able to pass.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.