Which of the following best describes dark matter? a. the area becomes too concentrated with stars. b. there are large clumps of galaxies. c. it is very large and invisible. d. dark matter can only be detected using light beams.

4. when a child cries out during rough play, the caregiver should a. encourage the distressed child to fight back. b. respond immediately, since the behavior has changed to fighting. c. ignore it, because rough play is a natural part of children’s learning. d. ignore the request for unless there has been an injury. i need answer