Which of the following figures is a pair of lines that are perpendicular?

Answer:
D is the correct answer.
Step-by-step explanation:
The lines are perpendicular as they go thiugh eachother at the center.
Answer:
4.) D
Step-by-step explanation:
A ( I'm not sure how to explain A )
B is an acute angle
C is a parallel line
D is a perpendicular line
I hope this helps!