It’s estimated that, at any given moment during daylight hours, more than vehicles are being driven by someone using a cell phone
a. 290,000
b.550,000
c.480,000
d.2,650,000

It is estimated that at any given moment during daylight hours, more than 812,000 vehicles are being driven by people using a hand held cell phone.

Explanation:

This in turn has led to regular accidents on roads caused by distraction of drivers by cell phones.

It is estimated that distrusted drivers kill up to 600 people around the year and injure up to 15000 people.

Phone distraction has been proven to cause most of the road accidents with the distrusting coming from either the driver himself or pedestrians.

Source: CSEA report.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.