Many people believe a European named johannes Gutenberg invented the printing press. However, Gutenbergs press was actually building on inventions that appeared centuries earlier in china

What is the connection between the idea in these sentences

Cause and effect
problem and solution
Comparison
Contrast

The connection between the idea in these sentences is comparison. The sentence compares the commonly held belief that Johannes Gutenberg invented the printing press with the fact that his press was actually based on earlier inventions in China.