Which of the following sentences contains an error in verb tense?

A. The last concert I attended was in June, but I am going to a huge music festival next week.

B. Derek carefully loaded his drums into his car, and then he goes and locks the keys inside.

C. Elena has a few friends in the music industry, and she gets to go backstage at some amazing shows.

D. If you practice hard on a daily basis, you will become more skilled at playing your instrument.