The correct answer is this one: "C. 5+5=10 "
From the equation 6 + 5 = 11
We can have the doubles : 5 + 5 + 1 = 11
The doubles plus one are the facts in which one addend is larger than the other by one.
Here are the choices.
A- 8+8=16 B- 7+7=14
C- 5+5=10 D- 4+4=8