Carl felt bad that he lost his best friend's DVD, so Carl has promised either to give him money for a new one or to buy a new copy at the store himself.

Question

What is the best way to write the underlined part of the sentence?
A.
or promised to buy a new copy at the store himself
B.
or he will buy a new copy at the store himself
C.
Leave as is
D.
or buying a new copy at the store himself

Answer 1

The best way to write the underlined part of the sentence is:

A. or promised to buy a new copy at the store himself

This option maintains parallel structure with the first part of the sentence ("promised either to give him money...") and fits well grammatically.