Final answer:
The combination of statements that is true is T and B.
Step-by-step explanation:
The question is asking which combination of statements is true. Let's break down each statement:
P) Some students earn A's in every math course for which they are enrolled.
Q) No ducks are reptiles.
R) All pets are loved.
T) A contains current taxpaying US citizens. B contains people that enjoy playing the piano.
Examining the statements, we can see that option d. T and B is true because it combines statement T and B, both of which are unrelated to each other and can be true at the same time.