Answer:
I think it is C
Explanation:
The other three happened so I can only guess that C is correct.
They would testify the word of god, So they were basically like pastors we had today. They would inform the teaching of Jesus Christ the lord and savior.
Have a nice day<3
It revolutionized the maritime industry by allowing faster travel that could now be controlled without being reliant on wind currents. Along with it being faster, you could now transport goods on larger ships through smaller bodies of water like rivers.