Roof trusses may be cut or modified in the field, make drywall nail pops less likely, cannot be used for long ceiling spans, and are usually designed for two-point bearing. Which of the following statements about roof trusses is true?
1) They can be used for long ceiling spans
2) They are not designed for two-point bearing
3) They cannot be cut or modified in the field
4) They do not make drywall nail pops less likely