A pregnant mouse is exposed to high levels of a chemical. Many of the mice in her litter are deformed, but when they are interbred with each other, all their offspring are normal. Which two of following statements could explain these results?a. In the deformed mice, somatic cells but not germ cells were mutatedb. The original mouse's germ cells were mutatedc. In the deformed mice, germ cells but not somatic cells were mutatedd. The toxic chemical could not affect development but is not mutagenic. e. None of the above