Read the following sentence. Pliny once wrote that Phoenician sailors who cooked on blocks of natron (soda) on a beach discovered glass accidentally.

Is the underlined phrase essential (restrictive) or nonessential (nonrestrictive)? Explain your reasoning.

answer; find problems that could cause a collision or breakdown;

answer: the mildest forms of push polling are designed merely to remind voters of a particular issue. for instance, a push poll might ask respondents to rank candidates based on their support of an issue in order to get voters thinking about that issue. many push polls are negative attacks on other candidates.

i dont know. what? ?