we know that
The triangle inequality theorem states that the sum of the lengths of any two sides of a triangle is greater than the length of the third side
so
Let
a,b,c------> the length sides of a triangle
The theorem states that three conditions must be met
case 1)

case 2)

case3)

therefore
the answer is the option
B. The sum of the lengths of any two sides of a triangle is greater than the length of the third side.