God's anger was kindled against Eli and his children because Eli did not
Train his children in the way of the LORD
Warn his children against sin
Apply appropriate sanctions on his children when due
Know the gravity of their actions
Correct answer is C
1 samuel 3:13 And I tell him that I am about to punish his house for ever, for the iniquity which he knew, because his sons were blaspheming God, and he did not restrain them.
This means Eli did not apply sanction or rebuke his children when when they sinned against God.