1-C. A universal counting system may be established in the future.A universal counting system may be established in the future.
普遍的な計数システムは、確立されるだろう、将来にダヨ。
2-C. The fact that there is no universal counting system, but a number of systems appropriate to specific situations, is proof of how creative and flexible we are.The fact that there is no universal counting system, but a number of systems appropriate to specific situations, is proof of how creative and flexible we are.
3-C. Because this approach seems so familiar, you may think that counting with 10 is universal.Because this approach seems so familiar, you may think that counting with 10 is universal.
4-C. Perhaps WHO's vision of "universal access to health care" can become a reality.Perhaps WHO's vision of "universal access to health care" can become a reality.