Which of the following might damage a paragraph's sense of unity? drifting off topic following a pattern writing a strong topic sentence

In the diagram below, ab and bc are tangent to o. what is the measure of

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy