Answer:
Option A, gneiss
Step-by-step explanation:
Metamorphic rocks are classified based on their grain arrangement in to foliated rocks and non- foliated rocks. These foliated rocks are the ones in which the grains are arranged in parallel layers bands which allows them to split apart along these band. Some common examples of foliated metamorphic rocks are slate, schist, and gneiss
Thus , option A gneiss is the correct answer.