Samoan is a Polynesian language - some other Polynesian languages are Tongan and Rapa Nui.
Micronesian languages are Oceanic languages which means they are also Austronesian languages
The false statement is the following one: C. The Oceanic branch's languages fall into three groups: Polynesian, Micronesian, and Melanesian. For example, there are more than 3 branches of the Oceanic , one of them is the Temotu branch
