Which of the following pair(s) of circles have /as a common internal tangent? Select all that apply.
A and B
A and C
B and C

Answer:
A and B, A and C
Step-by-step explanation:
A and B touch at T same as A and C. The tangent is in between the two circles but through the touching points. B and C share the tangent but externally since at T it does not pass in between them.