Select the sentence that contains no shifts in either verb tense or point of view. Select one:
a.
Every time a girl tries out for the school chess club, you have to overcome the prejudice that "girls don't play chess."
b.
Every time a girl tries out for the school chess club, she had to overcome the prejudice that "girls don't play chess."
c.
Every time a girl tries out for the school chess club, she has to overcome the prejudice that "girls don't play chess."

on my last

can you give us the passage> ?

explanation:

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.