There are five statements present. One of them contains an error. Choose the incorrect sentence.
A.Humanitarian agencies faced serious challenges in accessing vulnerable populations due to insecurity.
B. It also imposed blockades on government-controlled towns and on occasion attacked civilians who broke them.
C. Armed groups continued to kill and maim at children and target schools.
D. They have also recruited and used children in military operations.
E. Military courts have prosecuted and sentenced children to heavy penalties for terrorism-related offenses in trials that do not meet international juvenile justice standards.
The error is in sentence C as the preposition 'at' after the word 'maim' is incorrect and should be eliminated. The word 'maim' means 'to injure someone so severely that the body part stops working.' It should read as:'Armed groups continued to kill and maim children and target schools.'
Option 3 is thus the correct answer.