You have decided to conduct a research study examining the relationship between depression and relationship satisfaction. To do this you have collected a sample of 12 newlywed couples. In 4 of the couples, neither partner is depressed; in 4 of the couples, one partner is depressed; in the remaining 4 couples, both partners are depressed. You plan to assess both members of each couple on relationship satisfaction and depression every 6 months for the first 5 years of marriage. What type of design is this study

Jack owns a small home near a school. he doesn't have any children, and doesn't plan on having any in the future. jack is a writer and works out of his home. all of the noise from the playground during the day interrupts jack while he is trying to work. tina, a friend of jack's, also owns a small home. her home is in a quiet, little secluded neighborhood. she has a child that will be entering first grade in the fall and wishes she lived closer to a school. one day, jack asked tina if she would want to exchange homes. is this a possibility? a. yes, a trade of properties (exchange) is possible if the trade involves no financing and the properties are not mortgaged. b. yes, a trade of properties (exchange) is possible if the trade involves no financing. c. no, it is not a possibility. simply "trading" real estate is not recognized under california real estate law. d. none of the above