Which is a valid statement about rock formation? a. igneous rocks all formed under circumstances that no longer occur on earth b. sedimentary rocks form today the same way that they formed in the past c. on one really known how metamorphic rocks form

B. sedimentary rocks form today the same way that they formed in the past.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.