The correct answer is A) to use an appropriate level of formality.
<em>One suggestion for effective interaction is to use an appropriate level of formality.
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Humans are sociable creatures. From the very beginning of our lives, we are interacting with someone else. In a professional sphere, interaction has some written and unwritten rules that help is to better convey our ideas and never be rude to other people. Effective interaction is based on an apporpriate level of formality. This shows respect to the other individual. Formality shows education and opens the lines of communication for a better understanding.
While Lincoln took a moderate approach to Reconstruction, Congress sought to impose ... President Johnson proved to be an obstacle to the Radical Republicans in Congress, ... assassination, attempted to continue Lincoln's vision for Reconstruction.
