Which of the following sentences use correct end punctuation?
(a)-does this system track all parts ordering for the c45 model.
(b)-fire him. will you file these invoices?
(c)-when he became coo, ninheh asked to have his diploma from carnegie mellon placed next to his picture in the hallway.
(d)-our workgroup is going to lunch with the division manager next monday, aren’t we?

Tia and lin had been best friends since kindergarten. both avid soccer players, the girls decided to try out for the high school team together. unfortunately, there was just one open spot, so only one of the girls would be chosen. they both worked hard, and on tryout day, they did their best. when the team roster came out, lin was excited to see that she had made the team but sad that tia had not. tia was happy for her friend and vowed to work harder so she would make the team the next year. which sentence is the exposition of the passage