Fill in the blank (_) in the following sentence from the following choices.
Sentence: Neil had dental problem while Samuel did not because _ ate a lot of sweets and did not visit the dentist regularly.

Choice 1: Neil had dental problem while Samuel did not because Neil ate a lot of sweets and did not visit the dentist regularly.
Choice 2: Neil had dental problem while Samuel did not because Samuel ate a lot of sweets and did not visit the dentist regularly.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.