Which explanation accounts for where rocky planets formed? a. the inner portions of the disk are cold from the protostar making the heavy elements remain there. b. the inner portions of the disk are warm from the protostar making the heavy elements remain there. c. heavy elements spin into the outer regions of the disk due to their mass. d. heavy elements form in the outer regions of the disk due to the spinning protostar.

Which sentence is true about preconception care? a. women who are thinking about having a child should not worry about preconception care as it is unnecessary. b. preconception care is health care you receive after you get pregnant. c. it is aimed at finding and taking care of problems that could affect you or the baby during pregnancy and steps to reduce birth defects. d. it will involve taking medication and a strict diet and exercise plan.