To evaluate the quality of their product, a manufacturer of cell phones checks every 50th phones off the assembly line. I think this sample is valid or not valid because:

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.

a direct vote in which an entire electorate is invited to vote on a particular proposal. this may result in the adoption of a new law.  

spanish executed counts egmont and horne in brussels.

i dont know sorry, pay attention in class or use

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e