Which two sentences from the article contain
central ideas?

1. Many US, leaders felt new
businesses outside the
country could be one way
out of the depression.
2. Building the canal reshaped
the businesses and
governments of Central
America and islands in the
Caribbean.
3. This "Dollar Diplomacy Idea
also led the United States to
send troops into the
Dominican Republic, Cuba,
Haiti and Nicaragua.
4. Employing primarily
Jamaican migrants, Keith
developed both the labor
system and large-scale
farming in Costa Rica,
Panama, Honduras and
Guatemala.