complete the text with the best word. space scientists want to send researchers to mars in the future, ___…

complete the text with the best word. space scientists want to send researchers to mars in the future, ___ they are using simulations to prepare nasa researchers to live in isolation for extended periods of time. yet but so
Answer
Brief Explanations:
The first part states the goal of sending researchers to Mars. The second part describes the action of using simulations to prepare for long - term isolation. There is a cause - and - effect relationship. "So" is used to show a result or consequence. "Yet" and "but" show contrast, which is not the case here.
Answer:
so