Answer:
Blockchain has the potential to grow to be a bedrock of the worldwide record-keeping systems, but was launched just 10 years ago. It was created by the unknown persons behind the online cash currency bitcoin, under the pseudonym of Satoshi Nakamoto.
Explanation:
She buys her husband something for his watch by cutting her hair& selling it to buy something for his watch for him.
he sells his 2atch to buy her something for her hair.
That would be C, a conjunction.
