The correct answer is A) it has made the spread of cultures and ideas easier.
The way in that the development of cellular phones has been characteristic of the modern era? is that it has made the spread of cultures and ideas easier.
In a globalized world, technology and new forms of communication have helped people to stay connected 24/7, all the time. A cellular phone means that you have the world at your hand. You have a communication device but also a world of possibilities with millions of apps, video devices, entertainment, education, and news. Indeed, what is happening in other parts of the world can easily be accessed in minutes or seconds through your cellular phone.