Context: This is a piece of marble. Marble forms when rocks such as limestone are changed by high temperature and pressure.
Marble is made mostly of the minerals calcite and dolomite. Polished marble is used to make floors and kitchen counters.
What type of rock is marble?
A. sedimentary
B. metamorphic
C. igneous
Pick the correct answer from the listed options and provide the letter of the selected option.

B