Identify the sentence pair that maintains a consistent point of view.
B. We can't possibly solve the world's problems. We can only try to solve our own problems.
The subject is used consistently in this pair: it's we in both sentences. The possessive pronoun is also used consistently (our).
The choice of pronouns is inconsistent in A, C, and D:
A - you, one, your.
C - I, one, we.
D - you, we.