Answer:
By spreading its operations across a network of computers, blockchain allows Bitcoin and other cryptocurrencies to operate without the need for a central authority. This not only reduces risk but also eliminates many of the processing and transaction fees.
Explanation:
I believe it is the third option but it could be the fourth.
The poem "The Negro Speaks of Rivers" is made by Langston Hughes where likened his soul as deep as rivers. The term dusky was associted in the poem to rivers which he described repeatedly throughout as ancient and old. In this poem, the term dusky is referred to the age of the river. Answer is b. age.
It's September eighteenth here in the United States.