What is the origin of gymnastics?

Gymnastics originated from the Greek word 'gymnazein', which means exercise in the nude.
The practice of gymnastics began approximately 2,500 years ago, but it only became a competitive sport about 150 years ago.
Germany and Czechoslovakia developed gymnastics apparatus around the 1800s.
Friedrich Ludwig Jahn, a German educator, was known as the father of gymnastics.
a) Only statements I and II are true.
b) Only statements II and III are true.
c) Only statements III and IV are true.
d) All statements are true.