user
I can fill a room or just one heart.  Others can have me, but I can't be shared.  What am I?
A: segment
B: yard
C: loneliness
D: cardiologist
E: given
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>