El calentamiento que sufre actualmente el planeta, se debe a que los gases de invernadero, que aumentan drásticamente, se acumulan en la atmósfera y a. No permiten la entrada de los rayos del Sol. b. No permiten la salida de la radiación de calor de la Tierra. c. Retienen el agua en la atmósfera, impidiendo que se precipite en forma de lluvia. d. Liberan el vapor de agua hacia el espacio. respondan rapido plis

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !