The right answer is the letter D.
This is because opportunity cost is a term used in economics to indicate the cost of something in terms of a given opportunity, that is, the cost, even social, caused by the renunciation of the economic entity, as well as the benefits that could be obtained from this resigned opportunity or, even, the highest income generated in some alternative application.
In the case of the matter, there was a waiver on the opportunity to pay for a family trip, so that the family could buy a computer.
The question is about Hester and Ms. Walker who is her teacher.
Hester is a smart girl, she have new ideas to present and she walks towards Ms. Walker's desk . She wants to present her new idea to her but she is also nervous that she would forget the phrase in her mind that she keeps on repeating so she don't forget the phrase she have thought.
She is worried about forgetting her idea when she goes to Ms. Walker and she then hands over the letter about her new idea and when Ms. Walker accepts to consider her idea she is proud of her convincing letter.
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Esawar Prasad's article “The Future of Money” is published in a magazine. According to the article, the nodes are used to store and share transactional records. Thus, option b is accurate.
<h3>What is blockchain in bitcoin?</h3>
Bitcoin is digital money, and blockchain is the log not centralized for the dealings that happen across the network. They do not require any central authority to clear the transactions.
Nodes and blocks are an integral part of the blockchain that stores the data and are interconnected to run the core of the cryptocurrency. The transactional information is stored and encrypted in the nodes and blocks of the blockchain.
Therefore, option b. node share information in the form of blocks is accurate.
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3) experts warned the virus will continue to spread in the coming days
