Alex had sleep problems in early childhood which a study has shown could lead to attention problems up into early adolescents

The statement mentioned above can be categorized as "True".

Sleep problems do have a connection with less focus or less attention problems. Researchers are finding new ways for the patients to improve their sleep cycle to avoid such issues, better sleep measurement includes light therapy and better bedtime routines etc.

the atm that sounds like it should be the answer

b hope this