Emre: I think the invention of the smartphone is the most important because we can do everything with it.
Selin: I disagree. To me, the discovery of vaccines is more important because it saves millions of lives.
Emre: That's a good point, but smartphones also help people access health information.
Selin: Yes, but without vaccines, many diseases would still be deadly.
What can we infer about Selin's opinion?
A)She thinks smartphones are useless.
B)She believes vaccines are more valuable than smartphones.
C)She agrees with Emre completely.
D)She thinks vaccines are only for children.