user
A strange attraction compels me to hold your things most dear, yet I know it not, and feel no warmth in my holding.  My brothers and I stick close together until one faces me, and then is pushed away. 
A: clock
B: magnet
C: product
D: spar
E: item
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>