问题: Thetwonewstudies,lead-authoredbyProfessorPeterD.Loeb
A: showthattalkingonthephonewhiledrivingorwalkinginthestreetincreasesdeathsofdriversandpedestrians.
B:showthattalkingonthephonewhiledrivingincreasespedestriandeaths.
C:recommendthatstrictmeasuresbetakentorestraincellphoneuse.
D:bothAandC.
