Which is true about functional text?
a.)the best way to read functional text is to avoid looking for textual features.
b.)functional text is found in schools but not in businesses.
c.)a common feature of functional text is the use of diagrams, charts, and illustrations.
d.)many people read functional text, but few people write it.

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.

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