Metamorphic rocks can be formed by __________.
a.
igneous and sedimentary rocks
b.
sedimentary rocks only
c.
metamorphic rocks only
d.
all three types of rocks, igneous, sedimentary, and metamorphic
a.
igneous and sedimentary rocks
b.
sedimentary rocks only
c.
metamorphic rocks only
d.
all three types of rocks, igneous, sedimentary, and metamorphic