Your answer is A basalt because basalt is one of the most common igneous rocks also most of are continent is basalt also its not B because pumice is one of the lightest rocks in the world it feels like their is nothing inside it but when you cut it open it has all of the normal particles that a regular rock would have inside it its not granite because granite its really common its could be used for counter tops because of its really smooth surface it is also a igneous rock formed by pressure with lava and when it came down to rather A, or D I choose A because rhyolite is formed by many other rocks such as quartz or granite. Your answer is A.