Answer 1

without looking at the code much, it might be:
A) [to the tune “all around me are familiar faces”] the computer’s from a million years ago, maybe.
B) sololearn runs code on a beefy server somewhere, and then sends it back to your phone.
C) the computer’s other activities such as updates running in the background have been slowing it down.
D) the computer was less than $400.