The answer in the space provided is experiments. It is because in order to produce causation or to likely have a cause of something in particular, they need to conduct experiments in which they will likely form new ideas and test this ideas to form something new that will cause and contribute to others and will be of gain of knowledge.
My bet is on B because its ture, but a is also true. but id say B to be safe, people will still buy it if it rises because it is needed. like water. Its not like 6 bucks per 30 pack here but they still sell out because its needed.
The holy trinity is a Christian belief that God, Jesus, and the Holy Spirit are all one
