Read the following text:
Many experts believe that in the future, people won't use cash anymore; everything will be digital. Also, it's predicted that traditional schools might not exist, as learning will be mostly online. However, one thing is certain: people will always need to learn new skills to adapt to the changing world.
According to the text, what won't people use in the future?
A) Digital payments.
B) Online learning.
C) New skills.
D) Cash.