Answer:
| | (Parallel)
Explanation:
I'm assuming that is what it is asking. if b and c are perpendicular, that means they form 90 degrees on all angles. The same for b and d. So if both c and d are perpendicular to b, then they are parallel.
C and D are parallel
If b⊥c and b⊥d, then that means that they are both parallel because they both have a 90 degree anglewith line B.
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