Consider these four statements:

1. Field experiments are considered to provide better control than lab

experiments.

2. Field experiments are considered to provide better external validity (match

the real-world environment) than lab experiments.

3. Field experiments can be quite expensive.

4. Field experiments can be quite inexpensive.

Which of these statements are true?

1, 2, and 3.

2, 3, and 4.

1, 3, and 4.

1, 2, and 4.

None of these combinations are true.