Because of the density of vehicle in urban areas, you should
a. install sensors on all sides of your vehicle
b. keep an eye on your blind spots and watch for motorcycle
c . ignore your blind spots and any motorcycles
d. tailgate to maximize space efficiency

B. keep an eye on your blind spots and watch for motorcycle

Explanation:

Because of the density of vehicle in urban areas, you should keep an eye on your blind spots and watch for motorcycles.

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