Choose your answer from:
A). paying attention.
B). watching the road.
C). being alert.
D). using iPhones.
E). smoking cigarettes.
F). cigarettes.
G). hypothyroidism.
H). Electrical energy.

Fact 1: Using cell phones can cause people to become distracted. Fact 2: Video phone is also possible using iphone. Given the two facts above, what can cause people to become distracted?
Answer:
D).