HELP PLEASE Witch of the following would introduce a bias into an experiment?

A. Publishing your experimental results in a scientific journal.

B. Allowing other scientist to repeat and verify your experimental results.

C. Using a computer to record and store your data.

D. Discarding data that does not fit with your personal expectations.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above