The sentence “What’s more, the simplicity of digital banking, especially for young, wealthy customers, makes it very easy for them to change banks ...

The sentence “What’s more, the simplicity of digital banking, especially for young, wealthy customers, makes it very easy for them to change banks if their parents’ bank does not offer what they want” is introduced with a phrase that conveys an idea of
(A) opposition.
(B) reason.
(C) consequence.
(D) purpose.
(E) addition.