Sally goes to a school supply store to buy supplies. The price per pencil is $1.15, the price per marker is $2.45 and the price per eraser is $.59. Let p represent the number of pencils Sally buys, m represent the number of markers Sally buys and e represent the number of erasers Sally buys.

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.

answer: this is easy, i found "it"

i will repeat the question again, "find it."

here, i located it.

this is what i put and it was correct

it's a way for authors to communicate with reader in this time period. books from the past can teach us about life.

the answer is c) !