Awriter wants to make the following claim:

music education should be required not just in elementary school but in middle and high school, as well.

which of the following would provide the most convincing support for this claim?

-letters from parents and teachers supporting the inclusion of music education in upper grades

-editorials that claim students who participate in music education perform better in college

-statements from notable performing arts schools about the value of music education

- data from studies showing the mental and educational benefits of music education

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.