Question

for the third time, the band leader told carlotta she was marching out of step and drumming the wrong beat. she knew she needed to pull up her socks. so she made her mind stop wandering during band practice sessions. then, she added half an hour to her nightly drumming practice. which answer choice best shows the meaning of the underlined phrase pull up her socks? make efforts to improve begin to take drum lessons update her band uniform

Explanation:

The phrase "pull up her socks" in the context means to make efforts to improve. Carlotta was told she was out of step and drumming the wrong beat, so she decided to improve by adding more practice time. "Begin to take drum lessons" implies starting lessons, but she already was in the band. "Update her band uniform" is unrelated to improving her drumming. So "make efforts to improve" best matches the meaning.

Answer:

make efforts to improve