Astudy showed that children who watch more than five or more hours of television a day have lower grades than children who watch less. which of these could be a hidden variable?

a. tv viewing could lead to depression.
b. children who watch television might also play video games.
c. tv viewing and school grades might not be related.
d. children who watch more television may have parents who are home less often to them with schoolwork.

Яне знаю i don’t know,i is russia

Acquiring english is a way of learning where you learn english by birth, this includes listening to your parents, brothers and sisters and on the whole learning it from the environment around you while mastering standard english need qualified institutes and teachers who make certain programs and syllabus to you master the standard english. this also can include a long session of academic studies before you can master the standard english.standard english is necessary for literary works, official usage and writing materials for standardized publications or when someone needs to speak publicly. in most cases the employers of a company also demand and like the use of standard english from their employees. 

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