Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?

A random delay is used to ensure a collision-free link.
A random delay value for each device is assigned by the manufacturer.
A standard delay value could not be agreed upon among networking device vendors. 
A random delay helps prevent the stations from experiencing another collision during the transmission.

ccna exploration 1 chapter 9 Exam Question And Answers 

Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?