We really dont know much about the paragraph but i have read this beforen. the answer is A
Conflict between labor unions and factory owners
‘how to’ would be the significant phrase that makes it parallel
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Considering the new technological, economical and scientific development, it can be safely assumed that the future is rosy. On the technological side new projects such as virtual reality are being tested. In the near future people might even go in the virtual world themselves just like it is mostly showed in science fiction.
On the scientific side, new discoveries have been made such as pithovirus a giant virus found in Siberia. In the near future there is a high probability that cure or even vaccines against HIV/AIDS since a lot of research is being done in genetics though it requires a high amount of knowledge and technological resources
