Sally is concerned about the x-ray images her dentist plans to take of her teeth. she has read that x-rays can cause tissue effects, such as skin reddening and hair loss. which statement would best inform sally of the level of risk? a) the dentist uses x-ray fluoroscopy, which can take enough time to cause those problems. b) the dentist uses x-ray radiography, which takes too short a time to cause those problems. c) the dentist uses x-ray fluoroscopy, which takes too short a time to cause those problems. d) the dentist uses x-ray radiography, which can take enough time to cause those problems.