What Kind of Crust Was the Avalon Terrane Prior to Its

Multiple Choice

What kind of crust was the Avalon Terrane prior to its accretion to the Appalachians in the Acadian Orogeny in the Silurian and Devonian?

A) microcontinental fragment rifted off Rodinia or Gondwanaland
B) supracrustal Iapetus seafloor sediments and Gondwanaland passive margin succession
C) ophiolite-Iapetus Ocean crustal sequence
D) island arc sequence