Read the passage below and identify which of the following statements (1, 2, and 3) can be logically inferred. Select the correct combination from the options provided. Passage: Glaciers are massive bodies of slowly moving ice that form on land from the accumulation of snow over centuries. When a piece of a glacier breaks off and falls into the ocean, it is officially classified as an "iceberg." While most icebergs originate from freshwater glaciers, they can also break away from ice shelves, which are floating platforms of ice connected to a landmass. The Ross Ice Shelf is a well-known source of some of the largest tabular icebergs ever recorded. Statements: 1. The Ross Ice Shelf is responsible for the creation of certain large icebergs. 2. If an object is called a "glacier" while on land and "iceberg Z" once it enters the ocean, Z is simply a detached part of the original glacier. 3. All icebergs are composed of frozen saltwater.