Most of us use road blocks from time to time. Some common mistakes we make might include:. A. Not asking for clarification when you know you don't understand what is being said. B. Smiling even though you are really upset. C. Assuming you know what is going to be said. D. All of the above.

D. All of the above.

Explanation:

Most of us use road blocks from time to time. There are many types of roadblocks that an individual may use in different situations some some of the more common mistakes being, not asking for clarification when you know you don't understand what is being said, smiling even though you are really upset., or even assuming you know what is going to be said.

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by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.