With no explanation, chose the best option from "A" or "B". Tina's friend tells her that she has some serious concerns about Tina's new boyfriend. Tina wants to respond to her friend's comments about her new boyfriend.

A: Tina thanks her friend for her genuine concern and promises to be cautious and keep in mind what her friend has told her.
B: Tina tells her friend that she is just jealous of Tina for having a boyfriend and rudely dismisses all her friend's concerns.
A.